The genus Hypericum contains approximately 500 species which are divided into 36 sections as described by botanist Norman Robson.[2] This division into distinct sections is largely due to the fact that a genus-wide monograph was performed by Robson in 1977, which allowed for a comprehensive analysis of the genus's taxonomy.[3] A phylogenetic study was more recently completed for the genus, which gave evidence to suggest that the genus Triadenum is a clade within Hypericum and that the genus Thornea is sister to Hypericum. In addition, the study found that about 60% of the sections of Hypericum are monophyletic.[4]
Almost all species of Hypericum are either perennial herbs, shrubs, or small trees, but the genus also contains a small amount of subshrubs and annual herbs.[3] Most of its species contain hypericin or hyperforin and some are used for their healing properties in folk medicine. The species' leaves are always placed opposite, and are normally decussate.[5] Their flowers are generally homostylous, but very few are dimorphically heterostylous. The petals are normally golden yellow or orange, but some are white or cream, and are veined dorsally. They have 4-5 stamen fascicles, 2-5 ovaries, and 2-5 styles. Some species grow capsular fruit which are colored red or blackish.[6]
Hypericum species can be found all over the world in temperate to tropical areas. The genus is most diverse in Turkey (~80 species) and China (~60 species), but can be found across Asia and Europe, in parts of Africa and South America, Australia, and across the United States and southern Canada.[7] Non-native species have also been introduced into various regions of the United States and Argentina.[8] The genus are generally found in dry, desert areas to being in shallow water, and can be found from warm temperate climates to cold temperate climates.[6]
The type of plant that the species is described as
Distribution
The country or region where the species is most densely found
Sect. Adenosepalum
AdenosepalumSpach is divided into four subsections: Adenosepalum, Aethiopica, Caprifolia, and the Huber-Morathii Group. These subsections contain eight, seven, eleven, and five species, respectively, giving the section Adenosepalum a total of thirty-one species. In addition, Adenosepalum contains two Nothospecies: H. × joerstadii and H. pubescens × tomentosum. H. annulatum has three distinct subspecies.
Adenosepalum is made up of primarily perennial herbs, and also includes shrubs and shrublets. Its species grow to be approximately 2.5 meters tall, and are generally deciduous. Species in Adenosepalum are glabrous or have simple hairs, and almost always have dark black glands on their leaves, sepals, and rarely on their petals and stems. Their leaves are placed opposite and have no ventral glands. Their flowers are stellate or homostylous. They have 5 sepals, 5 stamen fascicles, and 5 petals.[6]
Adenotrias(Jaub. & Spach) R. Keller contains three species: H. aciferum, H. aegypticum, and H. russeggeri. Its type species is H. russeggeri. It is not divided into any subsections. H. aegypticum has three subspecies: H. aegypticum aegypticumL., H. aegypticum maroccanum(Pau) N.Robson, and H. aegypticum webbii(Spach) N.Robson.[55]
Adenotrias contains shrubs and shrublets. Its species can grow to be up to 2 meters tall. Its species are glabrous, but have no dark glands. Their leaves are lined and glandular, and are cortex green. Their flowers are almost tubular, and are heterostylous. They have 5 sepals, 5 petals, and 3 stamen fascicles.[6]
Androsaemum(Duhamel) Godron contains four species: H. androsaemum, H. foliosum, H. grandifolium, and H. hircinum. In addition, Androsaemum contains one Nothospecies: H. × inodorum. It is not divided into subsections. Its type species is H. androsaemum. One of its species, H. grandifolium, has five different subspecies. The section's species are often collectively referred to as Tutsan.
Androsaemum contains shrubs that grow to be from 0.3–2 meters tall. Its species are deciduous and glabrous, but have no dark glands. Their leaves are opposite, decussate, free, and are a pale color. Every species has 20 flowers, branching out from 2 separate nodes, which are homostylous. They have 5 sepals, 5 petals, and 5 stamen fascicles.[6]
ArthrophyllumJaub. & Spach contains five species, and is not divided into any subsections. Its type species is H. rupestre. Arthrophyllum is most closely related to Webbia.[71]
Arthrophyllum contains shrubs that grow to be approximately 0.9 meters tall and are deciduous but never leafless. Species in Arthrophyllum are glabrous, with reddish to dark glands. Their leaves are placed opposite and are either decussate, sessile, free, or perfoliate and have no ventral glands. They are 40-flowered, and their flowers are stellate and homostylous. They have 5 sepals that lack marginal glands. Arthrophyllum's species also have 5 petals and 3 stamen fascicles, each with 20-40 stamens. Their seeds are narrow and cylindrical.[6]
AscyreiaChoisy contains exactly 50 species and also includes four nothospecies. The section is one of the largest in the genus that is not divided into any subsections. Its type species is H. calycinum. The section is synonymous with NoryscaSpach..[7]
Ascyreia is made up of mostly shrubs or shrublets, but also contains a few trees. Its species generally grow to be from 4–5 meters tall. Some of the species are evergreen, but most are deciduous. They are glabrous, and lack dark glands. Their leaves are opposite, decussate, and free. The section's species have anywhere from 1-25 flowers, which are stellate and homostylous. They have five sepals, which are free. They also have five petals and five stamen fascicles, which each have 20-100 stamens. Their seeds are cylindric or ellipsoid, and some are laterally winged.[6]
Brathys(Mutis ex L.f.) Choisy is the largest section in Hypericum. It is divided into four subsections: Brathys, Phellotes, Spachium, and Styphelioides. Brathys contains 38 species and the type species, H. juniperinum. Phellotes contains 32 species, Spachium contains 14 species, and Styphelioides contains just 2 species. In total, the section contains 86 species.
Brathys contains a wide variety of plants, including small trees, shrubs, shrublets, and herbs. The largest species in the section grow to be 6 meters tall, and are evergreen. Its species are glabrous—though a few have simple hairs—and lack any dark glands. Their stems are either 4 or 6-lined, and are compressed when the plant is young, but later become terete. Their leaves are placed opposite, are decussate and sessile, and have dense marginal glands. All the species have either one flower on the uppermost node of the plant or 2-15 flowers branching from the uppermost node and from lower secondary nodes. The flowers are stellate or sometimes obconic, and are homostylous. The species have 5 petals which are persistent. They have 5 stamen fascicles which contain anywhere from 1-50 stamens each, formed in a tight ring, to give the plants a total of anywhere from 5-250 stamens. The plants have 5 ovaries, 5 sepals, and 3-5 styles.[6]
BupleuroidesStef. contains one species, H. bupleuroides, which shares the name of the section.
H. bupleuroides is a perennial herb that grows to be approximately 75 centimeters tall. The species' stems sprout from branching rhizomes, and are glabrous and lack dark glands. The leaves are placed opposite and are terete and are perfoliate. It has anywhere from 4-25 flowers that branch from 1-5 nodes and are stellate and homostylous and have 5 petals. There are either 3 or 4 stamen fascicles with 20-25 stamens each. The species has 5 sepals, 3 ovaries, and 3 styles.[6]
CampylopusBoiss. contains one species, H. cerastioides, which is also frequently called H. campylopus. This species is widely cultivated for its vibrant flowers. The section is most closely related to Olympia and Oligostema which are its sister taxa.[105]
Hypericum cerastioides is a perennial herb that grows to be 6-25 centimeters tall, and normally grows upright but sometimes grows prostrate along the ground. It can have a few or numerous stems from plant to plant, and is normally unbranched or branched only below the inflorescence. The stems are white and pubescent with 5-35 millimeter long internodes that can be either shorter or longer than the leaves. It is 1-5 flowered with flowers 2-5 centimeters in diameter. The petals are golden yellow without a tint of red and number 2 times the number of sepals in the inflorescence, and there are 60-100 stamens.
Campylosporus(Spach) R. Keller contains ten species from Africa and the Middle East. Its type species is H. lanceolatum.
The section contains primarily shrubs and trees that can be spreading or grow up to twelve meters tall. They are all evergreen and may or may not have dark glands along the branches. Most species have bark which is fissured and scaly. The species have many flowers which are homostylous. They have five sepals, five petals, and five stamen fascicles which each have 20-45 stamens.[6]
ConcinnaN.Robson contains one species, H. concinnum, which is commonly known as Goldwire.
H. concinnum is a perennial herb or infrequently a subshrub that grows up to 45 centimeters tall. Its stems are erect or ascend from taproots and have dark glands, and change from 4-lined to 2-lined as the species grows. The leaves are placed opposite, and are decussate and free, with closed lamina. The species is 17-flowered and the flowers are stellate and homostylous, with five petals each. The species has five stamen fascicles and a total of 40-100 stamens.[6]
CoridiumSpach contains six species from with distributions across Europe. Its type species is H. coris.
The species in the section are low dwarf shrubs or perennial herbs that grow up to 60 centimeters tall. The leaves are glabrous or paperlike, with stems that branch from the taproot and that have dark red and black glands. The leaves are three or four-whorled and have one vein. The species have one to many flowers that come from one to six nodes and are stellate and homostylous. They have five sepals, five petals, and three stamen fascicles with a total of 25-60 stamens.[6]
CrossophyllumSpach contains 4 species of perennial herbs. Its type species is H. orientale. The other species in the section are H. adenotrichum, H. aucheri, and H. thasium.
Species in Crossophyllum grow to be around 55 centimeters tall. They are glabrous, and their stems are erect from a rooting base. Their flowers also branch from the base and sometimes from intermediate nodes. The species have anywhere from 1 to 50 flowers which are stellate and homostylous. Their stems are narrow and eglandular and have dark black or amber glands on raised lines. The leaves are placed opposite and are free and decussate. The species have 5 sepals, 5 petals, and 3 or 5 stamen fascicles with 10-20 stamens each.[6]
DrosocarpiumSpach contains small perennial herbs that are found around the Mediterranean. H. richeri has 3 subspecies.
The species in the section grow up to 80 centimeters tall and are glabrous (except H. rochelii). Their leaves are placed opposite and are decussate and free. The species have anywhere between one and seventy flowers branching from one to three nodes which are stellate and homostylous. The species has five petals that are persistent after flowering and erect but not twisting, three or four stamen fascicles with a total of thirty to eighty stamens, and three to four styles.[6]
ElodeoidaN.Robson contains tall species of annual and perennial herbs. Its type species is H. elodeoides.
The species in the section grow to be up to one meter tall. Their stems are erect or lie flat, sometimes branch out at the base, and are terete. The leaves have dark glands on them and are placed opposite, are decussate, and grow about a centimeter long. The species can have up to fifty flowers, which are homostylous and stellate. They have five petal that remain after flowering and are erect. There are five stamen fascicles are there are a total of nine to sixty stamens with dark anther glands. The seeds are cylindric.[6]
GraveolentiaN.Robson is a diverse section of nine species whose type species is H. graveolens.
Graveolentia is similar to sect. Hypericum but differs in having mature stem internodes with different characteristics, as well as sepals with linear laminar glands and amber anther glands. Species in the section have one to seventy flowers regularly, but can have up to 124 in some circumstances, and they grow from one to four different nodes. The species have five sepals that are free and persistent and stand erect when the plants are in fruit. They also have five petals that are erect and not twisting and lack apiculus. There are also five stamen fascicles with a total of sixteen to ninety stamens.[6]
HeterophyllaN.Robson contains a single shrublet, H. heterophyllum, from which the section derives its name.
H. heterophyllum is a shrublet that grows to be up to 25 centimeters tall. It is semi-deciduous and glabrous and lacks dark glands. The stems are 2-lined and are colored cortex green, but their bark is smooth and reddish brown. The leaves are placed opposite and are decussate, sessile, and free. The leaf blades are open or 1-nerved and their glands are linear to punctiform and are dense in the margins but the ventral glands are absent. They have 3-12 flowers that branch from 1-3 nodes and sometimes the lower branches will flower as well., and the flowers are stellate and homostylous. There are five sepals, three styles, and three stamen fascicles with a total of 35-45 stamens.[6]
HirtellaStef., not to be confused with the unrelated genus Hirtella described by Linnaeus, is split into two subsections: subsect. Platyadenum and subsect. Stenadum, which have eighteen and eleven species respectively for a total of twenty nine species.
The section contains perennial herbs that grow up to eighty centimeters tall. They are often glaucous and the stems are erect or decumbent, and are rarely rooting (H. hyssopifolium). The stems are 2-lined and usually glandiferous. The leaves are placed opposite, are decussate, sessile, and are usually free. The leaf blades have pale glands but lack ventral glands. The species have few to many flowers that grow from five to fifteen nodes, and sometimes have flowering branches from lower nodes. Their flowers are stellate and homostylous. They have five sepals, five petals that are sometimes tinged red, and around three stamen fascicles with a total of 25-60 stamens. The seeds are cylindrical in shape.[6]
HumifusoideumR. Keller, also called Pulogensia, contains 6 species. Its type species is H. peplidifolium. H. beccarii has two subspecies: H. beccarii beccarii and H. beccarii steenisii.
Sect. Humifusoideum contains shrubs, subshrubs, and herbs that grow erect or prostrate and grow up to 1.5 meters tall. The shrubs are evergreen and glabrous and usually have dark glands. The stems are either 2-lined or 4-lined and are flattened when the plant is young, they usually lack glands, but rarely have dark glands; they are colored cortex greed or a dark red, while the bark is smooth and colored red-brown. The leaves are placed opposite, are decussate and free, and their blades are entire and either closed or open, with pale glands. The species usually have one flower, but very rarely can have up to ten that come from two nodes. The flowers are stellate and homostylous and have five free sepals that are persistent, five petals that are persistent and spreading, and three to five stamen fascicles with anywhere from ten to eighty stamens. The seeds are cylindric.[6]
Hypericum, sometimes referred to as the "type section" of the genus, contains perennial herbs and very few subshrubs. It contains the type species of the genus, H. perforatum. Subsect. Erecta, with twenty-three species, is the far less studied subsection of the section, while the details of subsect. Hypericum have been much more analyzed. Subsect. Hypericum has eighteen species total, with ten (including the type species) in ser. Hypericum, and eight in ser. Senanensia. The section contains forty-one species in total.
The species in sect. Hypericum grow to be 1.2 meters tall and can grow either erect or prostrate. They are glabrous some have dark glands while others do not. Their stems are 2-lined or 2-winged when young and either remain so or become terete as the plant ages. The leaves are placed opposite or abnormally whorled, are decussate, and are either sessile or pseudopetiolate, as well as being free and persistent. They are up to 70-flowered from one to four nodes, with some lower subsidiary branches. The flowers are stellate and homostylous. The species have 5 persistent sepals, 3 stamen fascicles, and 20-100 total stamens.[6]
InodoraStef. contains one species, a shrub called H. xylosteifolium or sometimes H. inodorum.
H. xylosteifolium grows to be approximately 1.5 meters, and is a deciduous plant. It typically has anywhere from 1-7 flowers, which are terminal and sometimes have subsidiary branches. The flowers are 1.5–3cm in diameter and are stellate and rounded. Its anthers are yellow-orange and its stamen are in fascicles in groups of 10–11.[6]
The section contains small perennial herbs that grow up to 40 centimeters tall. Their stems are erect to prostrate, and are creeping and branching at the base of the plant. They are glabrous and have dark glands on their leaves, seals, and petals. The stems are terete when mature and are normally eglandular, but will very rarely have a few reddish glands. The leaves are opposite, decussate, and sessile or pseudopetiolate. The laminar glands are either pale or black, and can be very dense to almost absent, and are relatively small. The species are normally 1-15 flowered, but in rare cases can have up to 50 flowers. They grow from one or two nodes, with lower subsidiary branches, and are stellate and homostylous. They have five sepals, five petals, five stamen fascicles with 10-45 total stamens, and 2-4 ovaries. The seeds are cylindric and not carinate.[6]
Roscyna(Spach) R. Keller contains 2 species: its type species, H. ascyron, and H. przewalskii. Roscyna was once considered to be its own individual genus which contained only the two species. H. ascyron has two subspecies, H. ascyron ascyron and H. ascyron gebleri.
Triadenioides contains shrubs and shrublets that grow up to 60 centimeters tall. They grow prostrate to erect and the lower parts of the plant are deciduous. Those confined to Socotra lack dark glands, but the species in the Levant have red to black glands on the flower and sometimes leaves or stems.[105] The leaves are either opposite or 3-whorled and are free and either sessile or petiolate. The species have between one and thirteen flowers that are stellate and have one style. They have 5 petals each which are spreading or erect. They have 3 stamen fascicles with many stamens and have 5 sepals.[6]
Tripentas(Casp.) N.Robson contains one long-stemmed perennial herb, H. elodes. Tripentas is sometimes separated into its own genus under the synonyms Elodes(Spach) W. Koch,MartiaSprengel,PerforariaChoisy,SpachelodesY. Kimura, or TripentasCasp.
Hypericum fossils have been found from the Late Eocene to the present day, with the most commonly found part of the plant being the seeds due to their hardiness. However, a small number of leaves and even pollen have also been found as fossils. The oldest fossil recovered was a seed belonging to the species H. antiquum which was found in Northern Asia. This species is considered to be the common ancestor of the family Hypericaceae.[140]
Hypericum is a genus of flowering plants in the family Hypericaceae. The genus has a nearly worldwide distribution, missing only from tropical lowlands, deserts and polar regions. Many Hypericum species are regarded as invasive species and noxious weeds. All members of the genus may be referred to as St. John's wort, and some are known as goatweed. The white or pink flowered marsh St. John's worts of North America and eastern Asia are generally accepted as belonging to the separate genus TriadenumRaf.
Hypericum balearicum is a species of flowering plant in the family Hypericaceae, native to Spain's Balearic Islands. It is the only species in the section Psorophytum.
Hypericum terrae-firmae is a woody perennial flowering plant in the St. John's wort family Hypericaceae. It is an endemic plant species of Belize.
Hypericum acmosepalum is a dwarf shrub in Hypericumsect. Ascyreia that is native to China and known as jian e jin si tao locally.
Hypericum aegypticum is a species of flowering plant of the St. John's wort family (Hypericaceae) which is native to the Eastern Mediterranean. It was described by Carl Linnaeus in the second volume of his Species Plantarum in 1753, who named it after Egypt despite it not being distributed there. The plant is commonly known as shrubby St. John's wort or Egyptian St. John's wort in English. Like other members of section Adenotrias, it is found among limestone rocks in coastal areas. While it has been evaluated as threatened on the island of Malta, the species has no legal protections.
Hypericum hircinum is a species of perennial flowering plant in the St John's wort family, Hypericaceae. It is known as goat St John's wort and stinking tutsan; both names refer to the plant's distinctive odor. The species is a bushy shrub that can grow up to 1.5 meters tall, is many-stemmed, and has golden yellow flowers with conspicuous stamens. The plant has been well-documented in botanical literature, with mentions dating back to at least 1627. Carl Linnaeus described H. hircinum several times, including in his 1753 Species Plantarum which established its binomial. At one point the plant was placed into the defunct genus Androsaemum, but it was returned to Hypericum by Norman Robson in 1985.
Hypericum cuisinii is a perennial herb in the genus Hypericum, in the section Adenosepalum. The herb has pale yellow flowers and occurs in Greece and Turkey.
Adenotrias is a section of flowering plants in the family Hypericaceae. It is made up of Hypericum aciferum, H. aegypticum, and H. russeggeri. When it was first described, it was considered its own independent genus, but was later placed under Hypericum and demoted to a section. Its Latin name Adenotrias is made of the Greek prefix adeno- and the Latin word trias. Species in the section are shrubs up to 2 metres (6.6 ft) tall with smooth leaves and bark, and are the only species in Hypericum with heterostylous flowers. They are found around the Mediterranean coast, with H. aciferum restricted to the island of Crete and H. russeggeri present only in parts of Turkey and Syria. Plants of the section have a habitat among limestone and other calcareous rocks. While H. aegypticum has a wide and generally secure distribution, H. aciferum was evaluated as endangered several times since the 1980s, although it is now considered only vulnerable because it is protected in part by a plant micro-reserve near Agia Roumeli.
Hypericum sect. Adenosepalum is one of 36 sections in the genus Hypericum. Its type species is Hypericum montanum.
Hypericum lancasteri, known as Lancaster's St. John's wort or as zhan e jin si tao in Chinese, is a species of flowering plant in the St. John's wort family Hypericaceae. The species has been awarded the Royal Horticultural Society's Award of Garden Merit.
Hypericum myrtifolium, the myrtleleaf St. Johnswort, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is endemic to the Southeastern United States. It was first described by Jean-Baptiste Lamarck in 1797.
Hypericum sect. Sampsonia is a small section of plants in the genus Hypericum. It comprises only two species, both endemic to eastern Asia: Hypericum sampsonii and Hypericum assamicum.
Hypericum huber-morathii is a species of flowering plant in the St John's wort family Hypericaceae. It is a small perennial herb with few stems. It has narrow and brittle stems, thick leaves, flowers in clusters of varying numbers, small yellow petals, around twenty stamens, and three styles. H. huber-morathii is closely related to H. minutum and H. sechmenii, and also shares characteristics with H. lanuginosum. The plant is endemic to Turkey, and is found among limestone rocks in a limited region of southwestern Anatolia. Originally excluded from a comprehensive monograph of Hypericum, the species' placement within the genus is unclear. It has been placed in both section Adenosepalum and section Origanifolium.
Hypericum aucheri, also known as Koramanotu in Turkish, is a herbaceous perennial flowering plant in the St. John's wort family Hypericaceae.
Hypericum coris, the heath-leaved St. John's wort, also called yellow coris, is a species of flowering plant in the family Hypericaceae, and is the type species of sect. Coridium. It is a low shrub, and it is found in Switzerland and northwestern Italy. The species has been a popular garden plant since the 18th century, valued for its long flowering period and for how well it adapts to cultivation.
Hypericum harperi, the sharplobe St. Johnswort or Harper's St. John's wort, is a perennial flowering plant in the family Hypericaceae. It is an aquatic herb native to southeast North America. H. harperi has a diploid chromosome number of 24.
Hypericum minutum is a species of flowering plant in the St John's wort family Hypericaceae. It is a small perennial herb that grows in tufts. It has slender and brittle stems, flowers in clusters of one to three, yellow petals with black and amber glands, few stamens, and a seed capsule with narrow grooves. H. minutum is closely related to H. huber-morathii and H. sechmenii and resembles a smaller form of the latter plant. The plant is endemic to Turkey, and is found among limestone rocks in a limited region of southwestern Anatolia. Originally excluded from a comprehensive monograph of Hypericum, the species' placement within the genus is unclear. It has been placed in both section Adenosepalum and section Origanifolium.
Hypericum elodeoides, commonly called the Himalayan St. John's Wort, is a species of flowering plant of the St. John's wort family (Hypericaceae).
Hypericum hirtellum is a species of flowering plant in the family Hypericaceae. It is native to Iran and Iraq and is found on chalky, sandy soil at elevations of 300–2,000 meters.
Hypericum qinlingense is a species of flowering plant in the St. John's wort family Hypericaceae. It is a perennial herb native to the Shaanxi province of China that grows up to 40 centimeters tall. The species has a rosette at its base, stiff and papery leaves, a flower cluster consisting of two parallel branches, and yellow-brown stripes of glands on its sepals and petals. It is similar in appearance to H. elodeoides, H. petiolatum, and species of section Adenosepalum that are native to China. H. qinlingense can be found on exposed slopes, roadsides, and in forests of oak, birch, and fir trees.
↑ Nürk, Nicolai M.; Madriñán, Santiago; Carine, Mark A.; Chase, Mark W.; Blattner, Frank R. (2013-01-01). "Molecular phylogenetics and morphological evolution of St. John's wort (Hypericum; Hypericaceae)". Molecular Phylogenetics and Evolution. 66 (1): 1–16. Bibcode:2013MolPE..66....1N. doi:10.1016/j.ympev.2012.08.022. ISSN1055-7903. PMID23058779.
↑ Brickell, Christopher (2008). A-Z encyclopedia of garden plants. Royal Horticultural Society (Great Britain) (3rded.). London: Dorling Kindersley in association with the Royal Horticultural Society. ISBN9781405332965. OCLC299238159.
↑ Bramwell, David (1976), "The Endemic Flora of the Canary Islands; Distribution, Relationships and Phytogeography", Biogeography and Ecology in the Canary Islands, Monographiae Biologicae, vol.30, Springer Netherlands, pp.207–240, doi:10.1007/978-94-010-1566-0_6, ISBN9789401015684
↑ Bramwell, D; Bramwell, Z (1974). Wild Flowers of the Canary Islands. Stanley Thornes (Publishers) Ltd.
↑ Scönfelder, P; Scönfelder, I (2005). Die Kosmos Kanarenflora. Kosmos.
1 2 La biodiversidad en Guanajuato: estudio de Estado. México: Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO). 2011. doi:10.5962/bhl.title.118977.
↑ Murthy, K; Rama, S; Rani, S; Pullaiah, T (2004). "Hypericum gaitii Haines (Hypericaceae), a new record for southern peninsular India". J. Bombay Nat. Hist. Soc. 101: 189–191.
↑ Biswas, SN (1972). "Hypericum griffithii Hook. F. et Thoms, ex Dyer emend. S. N. Biswas - a noteworthy flowering plant from eastern Himalayas". Bull. Bot. Surv. India. 13: 160–161.
↑ Sahni, KC; Naithani, HB. "Hypericum griffithii Hook. f. et Thoms. ex Dyer: a very rare shrub from Arunachal Pradesh". Indian Forester. 106: 865–868.
1 2 Hayata, B. (June 20, 1911). "Hypericineae". Journal of the College of Science, Imperial University of Tokyo. 30 (1): 38–39 – via Biodiversity Heritage Library.
↑ Kato, T. "Taxonomical studies on the Hypericum pseudopetiolatum complex: 2. Natural hybridizations in Kyushu". Bull. Nation. Sci. Mus., B (Tokyo). 12: 139–149.
↑ Kato, T (1987). "Taxonomical studies on the Hypericum pseudopetiolatum complex: 3. Taxonomy". Bull. Nation. Sci. Mus., B (Tokyo). 13: 69–80.
1 2 Oterino, A.; Lainz, M. (1997). "Sobre Hypericum tetrapterum Fr. e H. undulatum Schousb. ex Willd. en Asturias". An. Jard. Bot. Madrid. 55: 161–163.
↑ Rouet, JM (1979). "Hypericum australe dans le Var". Monde Pl. 74: 5.
↑ Puntieri, JG; Brion, CAM. "Hypericum humifusum (Clusiaceae), nueva especie adventicia en la Argentina. [Hypericum humifusum (Clusiaceae). new adventive species in Argentina.]". Hickenia. 3: 293–296.
↑ Khan, AA; Agrawal, S; Khan, A. "Hypericum japonicum Thunb. ex Murr. - a new record for Uttar Pradesh from Hastinapur Wildlife Sanctuary". J. Econ. Taxon. Bot. 30: 697–698.
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