Vitex rotundifolia

Last updated

Vitex rotundifolia
Vitex trifolia subsp. litoralis 03.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Lamiaceae
Genus: Vitex
Species:
V. rotundifolia
Binomial name
Vitex rotundifolia
Synonyms [1]

Vitex ovataThunb.
Vitex repensBlanco
Vitex rotundifolia f. albifloraY.N.Lee
Vitex rotundifolia f. albifloraS.S.Ying
Vitex rotundifolia f. roseaSatomi
Vitex trifolia subsp. litoralisSteenis
Vitex trifolia var. obovataBenth.
Vitex trifolia var. simplicifoliaCham.
Vitex trifolia var. unifoliolataSchauer

Contents

Vitex rotundifolia, the roundleaf chastetree [2] or beach vitex, is a species of flowering plant in the sage family Lamiaceae. It is native to seashores throughout the Pacific. Its range includes continents and islands stretching from India east to Hawaii and from Korea south to Australia. This shrub typically grows approximately 1 m in height. It has a sprawling growth habit and produces runners that root regularly at nodes. This rooting pattern allows the plant to spread rapidly. At maturity, V. rotundifolia produces blue-purple flowers that are borne in clusters and ultimately yield small brown-black fruits. Its leaves are rounded at the tips with green upper surfaces and silver lower surfaces. While the plant is a seashore obligate, it grows over a wide latitude range. It has been used for medicinal purposes throughout its native range. More recently, it was imported to the eastern United States where it has become a seashore invasive. Control efforts are presently underway to protect the fragile beach dune ecosystem.

Description

Vitex rotundifolia is a sprawling shrub that can grow as tall as 1.5 m though it typically ranges from 0.5 to 1 m in height. As a product of its rapid nodal rooting, the plant can form dense mats reaching in excess of 10 m from the parent plant. [3]

Stems

New stems are green, square and fleshy initially before maturing brown and woody. Older, large-diameter stems are covered with heavily fissured bark. Running horizontal stems produce frequent upright branches. Leaves are strongly aromatic, intensifying when crushed. [4]

Leaves

The majority of leaves are simple, but they can occasionally be palmate trifoliate or 2-leaved. [3] Leaves measure 2 to 6.5 cm in length and 1–4.5 cm in width. [4] Leaf margins are entire. The leaf shape varies from ovate to obovate with acute bases and obtuse apices. Occasionally, leaf apexes are acute or emarginate. Upper leaf surfaces are dark green whereas lower leaf surfaces range in color from silver to white to light green; all leaf surfaces are tomentose. [5] Petiole bases are typically somewhat purple and measure 0 to 1 cm in length. Blades are cupped downward slightly. Leaf veins are lighter green than surrounding tissue.

Flowers

The flowers are borne in indeterminate panicles that may be terminal or axillary. Inflorescences measure 3 to 7 cm in length. The calyx is cup-shaped and 4 to 4.5 cm long. Flowers are zygomorphic, purple to blue-purple, and short pedunculate. They are two-lipped and funnel-form (measuring 8 mm in length). Four stamens are didynamous and extend beyond the corolla tube (measuring 9 to 10 mm). The style extends beyond the stamens (total length: 12 mm). [4] Pollen is tricolpate. Ovaries consist of two carpels with each containing two single seeded locules.

Fruits

The fruits are globose drupes that are green while immature but turn yellow and red before maturing to bluish black. [6] The fruits are frequently incorrectly characterized in the literature as "seeds or berries". Each drupe contains a maximum of four seeds though there are usually fewer as a result of seed abortion. [7]

Seeds

Each seed is encapsulated in a separate compartment. Endosperm is absent. [8] Seeds germinate into tender seedlings that bear two cotyledons and quickly develop two red-margined true leaves. Ploidy level is 2n = 32, 34*. [4]

Vitex trifolia subsp. litoralis 06.jpg

Taxonomy

Vitex rotundifolia is a member of the family Lamiaceae [9] and subfamily Viticoideae. [10] The plant was originally described by the son of Carl Linnaeus, Carl Linnaeus the Younger [9] The original description was published in Supplementum Plantarum in 1782. [9] The generic epithet, Vitex, is derived from the Latin viere, meaning “to bind or twist” in reference to the rope-like stems produced by some species in the genus. [4] The specific epithet, rotundifolia, is derived from the Latin rotundus, which means "round, spherical", and folium, meaning "leaf.” This is a reference to the rounded character of the leaves.

Family level classification

Vitex and all other members of the family Verbenaceae save those in the subfamily Verbenoideae were recently moved to the family Lamiaceae. [10] As a result of this reorganization, two monophyletic families were established from the paraphyletic Verbenaceae and polyphyletic Lamiaceae. [11] This new classification scheme was initially proposed by Cantino in 1992. [12] Subsequent cpDNA analysis, [13] rbcL sequence analysis, [14] chemotaxonomic studies, [15] [16] and morphological analyses [17] have supported the original logic for family reorganization.

This revision has resulted in some confusion regarding the classification of V. rotundifolia in the literature. Despite the fact that the revision is well supported with volumes of data, many authors continue to incorrectly place the plant in Verbenaceae.

Species level classification

Recent revisions of the genus Vitex have placed V. rotundifolia in synonymy with V. trifolia subsp. littoralis Steenis. [7] [18] Previous researchers have placed V. rotundifolia within V. trifolia. Moldenke (1958) [19] placed V. rotundifolia in synonymy with V. trifolia var. simplicifolia. The placement of Moldenke was in disagreement with Corner (1939), [8] which held V. rotundifolia as distinct from V. trifolia. The placement of Corner was subsequently supported by several authors: Fosberg (1962), [20] Munir (1987), [3] and Wagner (1999). [4]

Common names

Vitex rotundifolia growing on rocks in Incheon, Korea Vitex trifolia subsp. litoralis 01.jpg
Vitex rotundifolia growing on rocks in Incheon, Korea

Likely due to the wide range over which V. rotundifolia is native, the plant has acquired a host of common names.

English speaking countries

China

Japan

Korea

Hawaii

Hybrids

Multiple hybrids between Vitex agnus-castus and Vitex rotundifolia have been developed at the Chicago Botanic Garden. These cultivars have undergone successful trials at Longwood Gardens. [29] The characteristics of the hybrids are more like those of V. rotundifolia than V. agnus-castus. [29] However, the hybrids are more upright than V. rotundifolia and have been described as "open and spreading." The leaf characteristics are intermediate between the two parent plants while the blue-purple flower color of the parents persists in the hybrid. [29]

Distribution and habitat

Vitex rotundifolia on a beach in Hawaii, US Starr 050516-1299 Vitex rotundifolia.jpg
Vitex rotundifolia on a beach in Hawaii, US

V. rotundifolia grows along sandy and rocky coasts from 0 to 15 m above sea level. [4] Plants grow down to the ocean waves themselves. V. rotundifolia is highly tolerant of the harsh beach dune environment characterized by intense heat, high wind, coarse-textured soil, and elevated salinity. [30]

This plant's natural range includes much of the Pacific Rim and many of the Pacific islands. The plant was observed by Munir from Northern and Western Australia, New Guinea, Indonesia, New Caledonia, Polynesia, Hawaii, Malaya, Philippines, and Hong Kong. [3] Moldenke reported V. rotundifolia in Brazil, Mauritius, Reunion, Bangladesh, Sri Lanka, Andaman Islands, China, Taiwan, Japan, Ryukyu Islands, Korea, Indochina, Thailand, Borneo, and Sarawak. [31] [32] The plant has also been observed in southern India. [33] Cultivation of V. rotundifolia has been reported in England, Florida, Germany, the Hawaiian Islands, Hong Kong, Java, Johnston Island, Maryland, and New York. [32] At present in the United States, beach vitex has become naturalized only in southeastern states along the east and gulf coasts. [34]

Biology and ecology

Beach vitex is a perennial that grows throughout the summer months in temperate and tropical areas of the Pacific. In temperate areas, the plant is deciduous and loses its leaves during the cool nights of fall. In the southeastern United States, leaves emerge in April while flowering occurs from June–August with fruiting following shortly thereafter. Fruits may remain attached to the plant into the early spring. V. rotundifolia is capable of overwintering on the dunes in South and North Carolina and in gulf coastal areas. It can survive in USDA hardiness zones 6b to 10.

Growth

The plant grows rapidly, and reproduces through vegetative means. [34] As the plant matures, it begins to flower. After maturation, the plant produces large numbers of fruits (up to 5581 fruits per square meter). [34]

Pollination

Insect visitation is the likely method of pollen transfer due to the spatial separation of the anthers and stigma, which would make self-pollination unlikely. Abe reported V. rotundifolia flowers on Nishino-shima Island were visited by flies, honey bees, beetles, butterflies, and ants though most of the visitors were ants. [35] [36] Diverse groups of pollinators visit the flowers in search of the 0.5 μL per flower nectar reward. [36] Due to this wide range of visitors, it is unlikely the plant would require a specialist insect to mediate successful pollination.

Dormancy

Evidence indicates that beach vitex possesses a combinational dormancy mechanism. This dormancy mechanism is made up of a physical dormancy component and a physiological dormancy component. [37] The physical dormancy mechanism is believed to be inforced at least in part by cuticular alkanes that prevent water penetration. [38] The mechanism of the physiological dormancy component is not yet fully understood. [37] This dormancy mechanism allows for the establishment of a substantial soil seed bank that is capable of surviving and producing new seedlings in excess of 4 years after all vegetation has been removed. [37] Dormancy mechanisms also allow the plant to undergo long-distance dispersal.

Dispersal

There is substantial supportive evidence of a water-based dispersal mechanism for beach vitex fruits. V. rotundifolia plants are present throughout the Pacific including coastal areas of two continents and many islands. Bird dispersal is highly unlikely as there is no fleshy fruit reward; water dispersal is the most likely dispersal means capable of enabling dispersal over such long distances. [34] Fruits are covered with thick coatings of hydrophobic cuticular alkanes allowing them to resist water penetration for extended periods. [37] [38] Researchers have observed V. rotundifolia fruits floating on rivers and oceans. [3]

Genetic diversity

Genetic diversity within populations has been found to be much lower than the average for most woody plants. [39] Additionally, the divergence between populations was found to be higher. There were large genetic differences between populations, indicating there is limited gene flow between populations. This is understandable due to the limited ecological niche beach vitex inhabits. Since the populations are largely clonal, this may enhance genetic drift. Significant variations have been observed with regard to genotype and chemotype of various beach vitex samples collected from across China. Genotypic and chemotypic variations were closely associated. [40] Large genetic variation between populations was observed with lower variation within populations, and plants within 20 m of each other were closely related. It was believed that differentiation of separated populations might be the cause of variations between populations. [41]

Medicinal uses

Vitex rotundifolia has many medicinal uses. These uses generally parallel those of Vitex agnus-castus .

Environmental concerns

In areas where it has been introduced outside of its native range, V. rotundifolia has proven to be an invasive species. This plant dominates dune ecosystems leading to a reduction in the prevalence of native species. [42] Native species exclusion is of particular concern because some of the species that share a niche with V. rotundifolia, such as sea beach amaranth ( Amaranthus pumilus Rafinesque), are presently listed as threatened. [43]

Vitex rotundifolia fruits have been shown to transfer cuticular alkanes to the sand substrate. This results in intense sand hydrophobicity that persists in the soil for many years. [38] This hydrophobicity might negatively impact dune recovery or serve as a means for limiting growth of native plant species. [38]

Sea turtle conservation groups have publicized concerns that dense V. rotundifolia growth may prevent sea turtles from reaching acceptable nesting sites. [44] These same organizations believe that V. rotundifolia may limit the ability of baby turtles to reach the ocean after they hatch. A recent USA Today article mentioned these concerns as part of an effort to raise awareness of V. rotundifolia, [45] and has at least one review article. [34] However, these concerns have not been validated scientifically. Several sea turtle species nest along the coasts of the Carolinas. These include the endangered loggerhead turtle (Caretta caretta), the endangered green turtle (Chelonia mydas), and the critically endangered Kemp's ridley (Lepidochelys kempii). If scientific evidence is found to support claims that V. rotundifolia harms sea turtles, this threat would constitute a substantial environmental issue.

Beach vitex emits large amounts of methyl chloride from its leaves. [46] V. rotundifolia was one of the six highest emitting species of 33 possessing this characteristic. [46] A total of 187 species were examined. Methyl chloride is produced naturally, but may be responsible for a substantial portion of the negative impacts on the stratospheric ozone layer.

Legislation

In light of the invasive characteristics of V. rotundifolia, it has been added to the North Carolina Noxious Weed List (effective 2/1/2009). Plants on this list are effectively banned within the state in that possession, sale, and transport of these species is illegal. [47] Virginia has enacted a permanent statewide quarantine (effective 05/07/12) to limit further V. rotundifolia spread. [48] At least 12 municipalities in North and South Carolina have enacted ordinances that ban V. rotundifolia planting and require homeowners to remove established plantings from their property. [44] In June 2020 Florida also banned V. rotundifolia, making it illegal to purchase in Florida or to move it into or within the state. [49] [50]

Control measures

Initially, beach vitex stems are wounded using a machete. A 5.25% solution of imazapyr is applied to the wounded areas of the stems. After a period of 6 months, all stems are removed. This treatment procedure is repeated until zero regrowth is observed. [34] Triclopyr may be used to treat small resprouts and seedlings. [34]

Related Research Articles

<span class="mw-page-title-main">Lamiaceae</span> Family of flowering plants that includes sage and mint

The Lamiaceae or Labiatae are a family of flowering plants commonly known as the mint, deadnettle or sage family. Many of the plants are aromatic in all parts and include widely used culinary herbs like basil, mint, rosemary, sage, savory, marjoram, oregano, hyssop, thyme, lavender, and perilla, as well as other medicinal herbs such as catnip, salvia, bee balm, wild dagga, and oriental motherwort. Some species are shrubs, trees, or, rarely, vines. Many members of the family are widely cultivated, not only for their aromatic qualities, but also their ease of cultivation, since they are readily propagated by stem cuttings. Besides those grown for their edible leaves, some are grown for decorative foliage. Others are grown for seed, such as Salvia hispanica (chia), or for their edible tubers, such as Plectranthus edulis, Plectranthus esculentus, Plectranthus rotundifolius, and Stachys affinis. Many are also grown ornamentally, notably coleus, Plectranthus, and many Salvia species and hybrids.

<i>Lantana</i> Genus of flowering plants

Lantana is a genus of about 150 species of perennial flowering plants in the verbena family, Verbenaceae. They are native to tropical regions of the Americas and Africa but exist as an introduced species in numerous areas, especially in the Australian-Pacific region, South and Northeastern part of India and Bangladesh. The genus includes both herbaceous plants and shrubs growing to 0.5–2 m (1.6–6.6 ft) tall. Their common names are shrub verbenas or lantanas. The generic name originated in Late Latin, where it refers to the unrelated Viburnum lantana.

<span class="mw-page-title-main">Verbenaceae</span> Family of flowering plants comprising vervains

The Verbenaceae, the verbena family or vervain family, is a family of mainly tropical flowering plants. It contains trees, shrubs, and herbs notable for heads, spikes, or clusters of small flowers, many of which have an aromatic smell.

<i>Vitex agnus-castus</i> Species of flowering plant in the mint family Lamiaceae

Vitex agnus-castus is a plant native of the Mediterranean region. It is one of the few temperate-zone species of Vitex, which is on the whole a genus of tropical and subtropical flowering plants. Theophrastus mentioned the shrub several times, as agnos (ἄγνος) in Enquiry into Plants. It has been long believed to be an anaphrodisiac – leading to its name as "chaste tree" – but its effectiveness for such action remains unproven.

<span class="mw-page-title-main">Seed dispersal</span> Movement or transport of seeds away from the parent plant

In spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, such as the wind, and living (biotic) vectors such as birds. Seeds can be dispersed away from the parent plant individually or collectively, as well as dispersed in both space and time. The patterns of seed dispersal are determined in large part by the dispersal mechanism and this has important implications for the demographic and genetic structure of plant populations, as well as migration patterns and species interactions. There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. These modes are typically inferred based on adaptations, such as wings or fleshy fruit. However, this simplified view may ignore complexity in dispersal. Plants can disperse via modes without possessing the typical associated adaptations and plant traits may be multifunctional.

<i>Verbena brasiliensis</i> Species of flowering plant

Verbena brasiliensis, the Brazilian verbena or Brazilian vervain, is a flowering plant species from the vervain family (Verbenaceae). It is native to parts of South America, namely Brazil, but has spread its range in recent times and has occasionally become an invasive weed. It is an annual plant with purple flowers, and it has been introduced outside of its native range as an ornamental plant, and is now largely considered an invasive weed in these regions.

<i>Vitex</i> Genus of flowering plants in the sage family Lamiaceae

Vitex is a genus of flowering plants in the sage family Lamiaceae. It has about 250 species. Common names include chaste tree or chastetree, traditionally referring to V. agnus-castus, but often applied to other species, as well.

<i>Clerodendrum</i> Genus of flowering plants

Clerodendrum is a genus of flowering plants formerly placed in the family Verbenaceae, but now considered to belong to the Lamiaceae (mint) family. Its common names include glorybower, bagflower and bleeding-heart. It is currently classified in the subfamily Ajugoideae, being one of several genera transferred from Verbenaceae to Lamiaceae in the 1990s, based on phylogenetic analysis of morphological and molecular data.

<i>Vitex trifolia</i> Species of shrub

Vitex trifolia, the simpleleaf chastetree, is a large coastal shrub or small tree.

<i>Oxera</i> Genus of flowering plants

Oxera is a genus of flowering plants in the family Lamiaceae native to Vanuatu and New Caledonia in the western Pacific.

<i>Vitex parviflora</i> Species of tree

Vitex parviflora is a species of plant in the family Verbenaceae, also known as smallflower chastetree or the molave tree. The name "molave" is from Spanish, derived from mulawin, the Tagalog word for the tree. It is also known as tugas in Visayan languages. It yields one of two woods from the same genus called molave wood, the other being Vitex cofassus.

<i>Clerodendrum quadriloculare</i> Species of plant in the family Lamiaceae

Clerodendrum quadriloculare is a species of flowering plant native to New Guinea and the Philippines. It is one of many species previously included in the family Verbenaceae, but transferred to the Lamiaceae based on molecular studies. The plants produce flowers which look good in a garden, but it can be difficult to eradicate.

<i>Vitex pinnata</i> Species of tree

Vitex pinnata is a tree of the family Lamiaceae. It is native to south and south east Asia. It grows slowly, ultimately reaching 20 metres in height with 1–3 m. circumference trunk. It features a grey-brown-yellow bark. Its leaves are scented.

<i>Conradina</i> Genus of flowering plants

Conradina is a genus of flowering plants in the mint family, Lamiaceae. Its common name is false rosemary, or rarely, short leaf rosemary. There are 7 species of Conradina, all native to the southeastern United States. Conradina verticillata grows on the Cumberland Plateau in Kentucky and Tennessee. The other five grow mainly in Florida. All of the species are closely related and there is some doubt about whether they are all separate. Most species occupy xeric habitats with well-drained soils composed of white sand. The genus Conradina was established by Asa Gray in 1870. It was named for the American botanist Solomon White Conrad.

<i>Rotheca</i> Genus of flowering plants

Rotheca is a genus of flowering plants in the family Lamiaceae. Estimates of the number of species in the genus vary from about 35 to as many as 60. Three of the species are native to tropical Asia, with the rest occurring in Sub-Saharan Africa. The type species for the genus is Rotheca serrata. It had originally been named Rotheca ternifolia, but this name is now considered illegitimate.

<span class="mw-page-title-main">Viticoideae</span> Subfamily of flowering plants in the sage family Lamiaceae

Viticoideae is one of seven subfamilies in the sage family, Lamiaceae.

<i>Petraeovitex</i> Genus of shrubs

Petraeovitex is a genus of eight climbing shrubs species known to science, of the mint family Lamiaceae . Collectively, they grow naturally in Borneo, Peninsular Malaysia, Sumatra, the Philippines, the Moluccas, New Guinea, Bismarck Archipelago, the Solomon Islands and Cape York Peninsula, Australia.

<i>Vitex altissima</i> Species of tree

Vitex altissima, the peacock chaste tree, is a species of woody plant reaching some 20 m in height, in the family of Lamiaceae. It is native to the Indomalayan realm, namely Bangladesh, India, Indonesia, Myanmar, and Sri Lanka, and is also found in New Guinea. Its greyish bark becomes scaly with maturity. The leaves are trifoliolate or palmate, compound and opposite. They are elliptic or elliptic-lanceolate in shape with acuminate apex and cuneate base. The margin is serrate or sometimes entire. The inflorescences are in terminal panicles. The corolla is bluish white. The purplish black fruit is a four-seeded drupe.

<i>Lepechinia hastata</i> Species of flowering plant

Lepechinia hastata is a rare species of perennial shrub in the mint family commonly known as the Cape pitcher sage or Baja pitcher sage. Lepechinia hastata is an aromatic shrub characterized by large, arrowhead-shaped leaves and attractive purple to magenta flowers. In the wild, it is known from the forested mountains of the Sierra de la Laguna in Baja California Sur and the volcanic Socorro Island in the Pacific Ocean, both part of Mexico. The plants of Socorro Island are their own subspecies, and differ in their white flowers and wooly, grayer foliage.

References

  1. ↑ "Vitex rotundifolia L.f. | Plants of the World Online | Kew Science".
  2. ↑ USDA, NRCS (n.d.). "Vitex rotundifolia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 6 August 2015.
  3. 1 2 3 4 5 Munir, A.A. (1987). "A taxonomic revision of the genus Vitex L. (Verbenaceae)* in Australia". Journal of the Adelaide Botanic Garden. 10 (1): 31–79.
  4. 1 2 3 4 5 6 7 Wagner, W.L; D.R. Herbst; S.H. Sohmer (1999). Manual of the Flowering Plants of Hawai'i. Honolulu: Bishop Museum Press. ISBN   978-0-8248-2166-1.
  5. ↑ Flora of Taiwan Editorial Committee, W.L (1978). Flora of Taiwan. Vol. 4. Taipei: Epoch.
  6. 1 2 Flora of China Editorial Committee, R. M. (1994). "Vitex". Flora of China. Vol. 17. pp. 28–32. Retrieved 6 June 2010.
  7. 1 2 de Kok, R. (2007). "The genus Vitex (Lamiaceae) in New Guinea and the South Pacific Islands". Kew Bulletin. 62: 587–603.
  8. 1 2 Corner, E. J. H. (1939). "Notes on the systematy and distribution of Malayan phanerogams III". Gard. Bull. Straits Settlem. 10: 239–329.
  9. 1 2 3 "International Plant Names Index" . Retrieved 6 June 2010.
  10. 1 2 Harley, R. M.; S. Atkins; A. L. Budantsev; P. D. Cantino; B. J. Conn; R. Grayer; M. M. Harley; R. de Kok; T. Krestovskaja; R. Morales; A. J. Paton; O. Ryding; T. Upson (2004). "Labiatae". In Kubitzki K.; Kadereit J. W. (eds.). The families and genera of vascular plants. Vol. 7. Berlin: Springer. pp. 167–275. ISBN   978-3-540-40593-1.
  11. ↑ Cantino, P.D. (1992). "Toward a phylogenetic classification of the Labiatae". In R.M. Harley; T. Reynolds (eds.). Advances in Labiatae Science. Kew: Royal Botanical Gardens. pp. 27–37. ISBN   978-0-947643-52-2.
  12. ↑ Cantino, P.D.; R.M. Harley; S.J. Wagstaff (1992). "Genera of Labitae: Status and Classification". In R.M. Harley; T. Reynolds (eds.). Advances in Labiatae Science. Kew: Royal Botanical Gardens. pp. 511–522. ISBN   978-0-947643-52-2.
  13. ↑ Wagstaff, S. J.; L. Hickerson; R. Spangler; P. A. Reeves; R. G. Olmstead 1998 (1998). "Phylogeny in Labiatae s. l., inferred from cpDNA sequences". Plant Systematics and Evolution. 209 (3–4): 265–274. doi:10.1007/BF00985232. S2CID   601658.{{cite journal}}: CS1 maint: numeric names: authors list (link)
  14. ↑ Wagstaff, S. J.; R. G. Olmstead (1997). "Phylogeny of Labiatae and Verbenaceae Inferred from rbcL Sequences". Systematic Botany. 22 (1): 165–179. doi:10.2307/2419684. JSTOR   2419684.
  15. ↑ vonPoser, G.L.; M. E. Toffoli; M. Sobral; A.T. Henriques (1997). "Iridoid glucosides substitution patterns in Verbenaceae and their taxonomic implication". Plant Systematics and Evolution. 205 (3–4): 265–287. doi:10.1007/BF01464409. S2CID   41594986.
  16. ↑ Alvarenga, S. A. V.; J. P. Gastmans; G. V. Rodrigues; P. R. H. Moreno; V. P. Emerenciano (2001). "A computer-assisted approach for chemotaxonomic studies - diterpenes in Lamiaceae". Phytochemistry. 56 (6): 583–595. doi:10.1016/S0031-9422(00)00424-6. PMID   11281136.
  17. ↑ Ryding, O. (2007). "Amount of calyx fibres in Lamiaceae, relation to calyx structure, phylogeny and ecology". Plant Systematics and Evolution. 268 (1–4): 45–58. doi:10.1007/s00606-007-0537-y. S2CID   31670147.
  18. ↑ de Kok, R. (2008). "The genus Vitex (Labiatae) in the Flora Malesiana region, excluding New Guinea". Kew Bulletin. 63 (1): 17–40. doi:10.1007/s12225-007-9013-7. S2CID   28905761.
  19. ↑ Moldenke, H.N. (1958). "Materials toward a monograph of the genus Vitex X". Phytologia. 6: 129–192. doi: 10.5962/bhl.part.9771 .
  20. ↑ Fosberg, F.R. (1962). "Miscellaneous notes on Hawaiian plants – 3". Occasional Papers of Bernice P. Bishop Museum. 23 (2): 29–44.
  21. 1 2 3 USDA (2010). "Invasive Species: Plants - Beach Vitex (Vitex rotundifolia)" . Retrieved 6 June 2010.
  22. 1 2 USDA, ARS, National Genetic Resources Program, National Germplasm Resources Laboratory (2010). "Germplasm Resources Information Network - (GRIN):Vitex rotundifolia" . Retrieved 6 June 2010.{{cite web}}: CS1 maint: multiple names: authors list (link)[ permanent dead link ]
  23. ↑ Porcher, M. H; et al. (2010). "Sorting Vitex Names. Multilingual Multiscript Plant Name Database - A Work in Progress. Institute of Land & Food Resources. The University of Melbourne. Australia" . Retrieved 6 June 2010.[ dead link ]
  24. ↑ Shin'ichi, F.; N. Kiyo; M. Kayo (2000). "Constituents of the essential oil of Vitex rotundifolia Linn fil". Koryo, Terupen Oyobi Seiyu Kagaku Ni Kansuru Toronkai Koen Yoshishu. 44: 44–46.
  25. ↑ "Korean Plant Names Index > Search "Vitex rotundifolia"".
  26. ↑ Shin, T.Y.; S.H. Kim; J.P. Lim; E.S. Suh; H.J. Jeong; B.D. Kim; E.J. Park; W.J. Hwang; D.G. Rye; S.H. Baek; N.H. An; H.M. Kim (2000). "Effect of Vitex rotundifolia on immediate-type allergic reaction". Journal of Ethnopharmacology. 72 (3): 443–450. doi:10.1016/S0378-8741(00)00258-0. PMID   10996284.
  27. 1 2 3 4 5 6 University of Hawaii at Manoa: College of Tropical Agriculture and Human Resources (2010). "Hawaiian Native Plant Propagation Database:Vitex rotundifolia" . Retrieved 6 June 2010.
  28. ↑ Mary Kawena Pukui; Samuel Hoyt Elbert (2003). "lookup of pōhinahina". in Hawaiian Dictionary. Ulukau, the Hawaiian Electronic Library, University of Hawaii Press.
  29. 1 2 3 Metrustry, D.; T. Anisko (15 September 2006). "Versatile Vitex" (PDF). American Nurseryman: 34–26. Archived from the original (PDF) on 13 June 2010. Retrieved 6 June 2010.
  30. ↑ Dirr, M. A. (1998). Manual of woody landscape plants: Their identification, ornamental characteristics, culture, propagation, and uses. Champaign, IL: Stipes. p. 1092. ISBN   978-0-87563-795-2.
  31. ↑ Moldenke, H. N. (1971). A fifth Summary of the Verbenaceae, Avicenniaceae, Stilbaceae, Dicrastylidaceae, Synphoremaceae, Nyctanthaceae, and Eriocaulaceae of the World etc. Vol. 1 & 2. Painfield, NJ: H.N. & A.L. Moldenke.
  32. 1 2 Moldenke, H. N. (1980). Phytologia Memoirs. II A sixth Summary of the Verbenaceae, Avicenniaceae, Stilbaceae, Chloanthaceae, Synphoremaceae, Nyctanthaceae, and Eriocaulaceae of the World etc. Painfield, NJ: H.N. & A.L. Moldenke.
  33. ↑ Sivarajan, V.V.; K.S. Manilal (1982). "Notes on some interesting species of Verbenaceae from South India". J. Econ. Tax. Bot. 3: 813–817.
  34. 1 2 3 4 5 6 7 Cousins, M.M.; J. Briggs; C. Gresham; J. Whetstone; T. Whitwell (2010). "Beach Vitex (Vitex rotundifolia): An Invasive Coastal Species". Invasive Plant Science and Management. 3 (3): 340–345. doi: 10.1614/IPSM-D-09-00055.1 . S2CID   13849295.
  35. ↑ Abe, T. (2006). "Colonization of Nishino-shima Island by plants and arthropods 31 years after eruption" (PDF). Pacific Science. 60 (3): 355–365. doi:10.1353/psc.2006.0014. hdl: 10125/22571 . S2CID   53702453.
  36. 1 2 Abe, T. (2006). "Threatened pollination systems in native flora of the Ogasawara (Bonin) Islands". Annals of Botany. 98 (2): 317–334. doi:10.1093/aob/mcl117. PMC   2803473 . PMID   16790463.
  37. 1 2 3 4 Cousins, M.M.; J. Briggs; T. Whitwell; C. Gresham; J. Whetstone (2010). "Reestablishment Potential of Beach Vitex (Vitex rotundifolia L. f.) Following Removal and Control Efforts". Invasive Plant Science and Management. 3 (3): 327–333. doi:10.1614/IPSM-D-09-00062.1. S2CID   86043702.
  38. 1 2 3 4 Cousins, M.M.; C. Gresham; M. B. Riley; T. Whitwell (2009). "Beach Dune Sand Hydrophobicity Due to the Presence of Beach Vitex (Vitex rotundifolia L. f.)". Journal of Agricultural and Food Chemistry. 57 (2): 409–415. doi:10.1021/jf8025259. PMID   19090757.
  39. ↑ Yeeh, Y.; S. S. Kang; H. G. Chung; M. S. Chung; M. G. Chung (1996). "Genetic and clonal diversity in Korean populations of Vitex rotundifolia (Verbenaceae)". Journal of Plant Research. 109 (2): 161–168. doi:10.1007/BF02344541. S2CID   29083993.
  40. ↑ Hu, Y.; Q.Y. Zhang; H.L. Xin; L.P. Qin; B.R. Lu; K. Rahman; H.C. Zheng (2007). "Association between chemical and genetic variation of Vitex rotundifolia populations from different locations in China: its implication for quality control of medicinal plants". Biomedical Chromatography. 21 (9): 967–975. doi:10.1002/bmc.841. PMID   17474140.
  41. ↑ Hu, Y.; Y. Zhu; Q.Y. Zhang; H.L. Xin; L.P. Qin; B.R. Lu; K. Rahman; H.C. Zheng (2008). "Population Genetic Structure of the Medicinal Plant Vitex rotundifolia in China: Implications for its Use and Conservation". Journal of Integrative Plant Biology. 50 (9): 1118–1129. doi:10.1111/j.1744-7909.2008.00635.x. PMID   18844780.
  42. ↑ Gresham, C.; A. Neal (2004). "An evaluation of the invasive potential of beach vitex (Vitex rotundifolia)" (PDF). Retrieved 27 March 2010.
  43. ↑ U.S. Fish and Wildlife Service (2010). "Sea beach Amaranth (Amaranthus pumilus) [threatened]" . Retrieved 23 June 2010.
  44. 1 2 "Beach Vitex Task Force". 2010. Retrieved 15 June 2010.
  45. ↑ Dorell, O. (2009). "Invasive vines assault East Coast beaches". USA Today (15 October): 8A.
  46. 1 2 Yokouchi, Y.; T. Saito; C. Ishigaki; M. Aramoto (2007). "Identification of methyl chloride-emitting plants and atmospheric measurements on a subtropical island". Chemosphere. 69 (4): 549–553. Bibcode:2007Chmsp..69..549Y. doi:10.1016/j.chemosphere.2007.03.028. PMID   17462706.
  47. ↑ North Carolina Department of Agriculture and Consumer Services (2009). "North Carolina Noxious Weeds List". Archived from the original on 18 July 2010. Retrieved 23 June 2010.
  48. ↑ Virginia Department of Agriculture and Consumer Services (2009). "Board of agriculture and consumer services issues permanent beach vitex quarantine". Archived from the original on 17 June 2010. Retrieved 23 June 2010.
  49. ↑ "23316392, 5B-57.001 - Florida Administrative Rules, Law, Code, Register - FAC, FAR, eRulemaking".
  50. ↑ "Newly banned beach weed threatens sea turtle nesting sites - UF/IFAS News". 20 October 2020.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.