Verbena bonariensis | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Lamiales |
Family: | Verbenaceae |
Genus: | Verbena |
Species: | V. bonariensis |
Binomial name | |
Verbena bonariensis | |
Synonyms [1] | |
Verbena bonariensis, the purpletop vervain, clustertop vervain, Argentinian vervain, [2] tall verbena or pretty verbena, is a member of the verbena family cultivated as a flowering annual or herbaceous perennial plant. In USA horticulture, it is also known by the ambiguous names purpletop (also used for the grass Tridens flavus ) and South American vervain (which can mean any of the numerous species in the genus Verbena occurring in that continent). For the misapplication "Brazilian verbena" see below.
It is native to tropical South America where it grows throughout most of the warm regions, from Colombia and Brazil to Argentina and Chile.
Verbena bonariensis is a tall and slender-stemmed perennial. It can grow to 6 ft (180 cm) tall and can spread to 3 ft (90 cm) wide. At maturity, it will develop a woody base. Fragrant lavender to rose-purple flowers are in tight clusters located on terminal and axillary stems, blooming from mid-summer until fall frost. The stem is square with very long internodes. Leaves are ovate to ovate-lanceolate with a toothed margin and grow up to 4 in (10 cm) long.
Verbena is derived from Latin, meaning ‘sacred bough’, in reference to the leafy twigs of vervaine ( Verbena officinalis ) which were historically carried by priests, used in wreaths for druidic rituals, and for medicine. Named by Virgil and Pliny the Elder. The common name, vervaine, comes from the Celtic name, ‘ferfain’. [3]
Its specific epithet bonariensis means ‘from Buenos Aires, Argentina’. ‘Buenos’ means ‘good’ and ‘aires’ means ‘air’ (‘good air’). [3] [4]
Verbena bonariensis is a member of the South American vervains, which are polyploid and have more than 14 chromosomes. Among these, it is part of a lineage which might also include Verbena intermedia and seems well distant from Verbena litoralis or Verbena montevidensis for example. [5]
Sometimes, the name Verbena brasiliensis , Brazilian verbena or Brazilian vervain, is found for this species. [6] However, this is the result of a mix-up with V. brasiliensis, the "true" Brazilian verbena, which has been erroneously referred to as V. bonariaensis by several botanists. [7]
There are two named subspecies: [8] [ citation needed ]
V. bonariensis is cultivated as an ornamental plant for traditional and drought tolerant and 'pollinator-host' gardens and parks.
It is a perennial, hardy in USDA Zones 7-11. It can be grown as an annual in areas where it is not winter hardy and will bloom in the first year when grown from seed. Its long internodes give it a sparse appearance but allow it to intermingle and coexist with other plants. The flowers which appear in mid- to late summer, are very attractive to butterflies, and provide nectar for native bees and many beneficial garden insects.
This species grows best in a well-drained soil. It prefers full sun to partial shade and needs regular moisture. It has a reputation of rarely being attacked by insect pests, but may be susceptible to powdery mildew. V. bonariensis is commonly grown from seed which germinates readily without pre-treatment, but can also be propagated from herbaceous stem cuttings.
It has gained the Royal Horticultural Society's Award of Garden Merit. [9] [10]
V. bonariensis self-seeds readily. This ability has raised concerns that it may become an invasive species and noxious weed in favorable habitats. [11] It has naturalized in a number of southern United States.
Presently, the plant is on the invasive species watchlist for Washington state, [12] naturalized in tropical and southern Africa, temperate Asia, Australia, New Zealand, the United States (including Hawaii), the West Indies, Macaronesia and the Mascarene Islands. According to Pacific Island Ecosystems at Risk, it is considered a weed in Fiji, New Guinea and other South Pacific islands. [13]
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.
Verbena, also known as vervain or verveine, is a genus in the family Verbenaceae. It contains about 150 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the Americas and Asia; however, Verbena officinalis, the common vervain or common verbena, is the type species and native to Europe.
Euphorbia myrsinites, the myrtle spurge, blue spurge, or broad-leaved glaucous-spurge, is a succulent species of flowering plant in the spurge family Euphorbiaceae.
Gypsophila paniculata, the baby's breath, common gypsophila or panicled baby's-breath, is a species of flowering plant in the family Caryophyllaceae, native to central and eastern Europe. It is an herbaceous perennial growing to 1.2 m (4 ft) tall and wide, with mounds of branching stems covered in clouds of tiny white flowers in summer. Another possible source of this name is its scent, which has been described as sour milk, like a baby’s “spit-up”. Its natural habitat is on the Steppes in dry, sandy and stony places, often on calcareous soils. Specimens of this plant were first sent to Linnaeus from St. Petersburg by the Swiss-Russian botanist Johann Amman.
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.
Asparagus setaceus, commonly known as common asparagus fern, asparagus grass, lace fern, climbing asparagus, or ferny asparagus, is a climbing plant in the genus Asparagus. Despite its common name, the plant is not a true fern, but has leaves that resemble one.
Lantana camara is a species of flowering plant within the verbena family (Verbenaceae), native to the American tropics. It is a very adaptable species, which can inhabit a wide variety of ecosystems; once it has been introduced into a habitat it spreads rapidly; between 45ºN and 45ºS and more than 1,400 metres in altitude.
Verbena urticifolia, known as nettle-leaved vervain or white vervain, is a herbaceous plant in the vervain family (Verbenaceae). It belongs to the "true" vervains of genus Verbena.
Verbena hastata, commonly known as American vervain, blue vervain, simpler's joy, or swamp verbena, is a perennial flowering plant in the vervain family Verbenaceae. It grows throughout the continental United States and in much of southern Canada.
Hydrocotyle bonariensis, the largeleaf pennywort, once a member of the family Apiaceae, now in the family Araliaceae and of the genus Hydrocotyle, is a hairless and creeping perennial.
Verbena litoralis is a species of verbena known by the common names seashore vervain and Brazilian vervain, and in Hawaiian, ōwī. It is native to the Americas from Mexico south through Central and South America to Argentina and Chile. It is present throughout the world as an introduced species and in some areas a noxious weed. It is naturalized in the contiguous United States, Puerto Rico, Hawaii, Italy, Spain, South Africa, Mauritius, the Galápagos Islands, Australia, Easter Island, French Polynesia, Japan, New Zealand, and other places. It grows in many types of habitat, including disturbed and cultivated areas.
Verbena rigida, known as slender vervain or tuberous vervain, is a flowering herbaceous perennial plant in the family Verbenaceae. It is native to Brazil and Argentina, and is not fully hardy in temperate climates, where consequently it is grown from seed as an annual.
Stachytarpheta mutabilis is a species of flowering plant in the verbena family known by the common names changeable velvetberry, coral porterweed, pink snakeweed, red snakeweed, and pink rat tail. It is native to Mexico, the Caribbean, and South America. It can be found in many other places as an introduced species. It is cultivated as an ornamental plant.
Richardia brasiliensis is a species of flowering plant in the coffee family known by the English common names tropical Mexican clover, Brazilian calla-lily, white-eye, and Brazil pusley. In Brazil it is known as poaia branca. It is native to South America. It is an introduced species and sometimes an invasive weed in many other places, including Hawaii, Indonesia, Japan, and Thailand. It is a weed of citrus groves in Florida.
Stachytarpheta cayennensis is a species of flowering plant in the verbena family known by many English language common names, including blue snakeweed, Cayenne snakeweed, dark-blue snakeweed, bluetop, nettle-leaf porterweed, rattail, rough-leaf false vervain, blue rat's tail, Brazilian tea, Cayenne vervain, false verbena, joee, nettleleaf velvetberry, and Cayenne porterweed. Names in other languages include honagasō (Japanese), gervão-urticante, piche de gato, rabo de zorro (Spanish), herbe á chenille, herbe bleue, queue de rat (French), ōi or ōwī (Hawaiian), sakura or ouchung (Chuukese), and tiāki (Māori). It is native to the Americas, from Mexico south through Central and South America to Argentina, as well as many islands of the Caribbean. It is known in many other parts of the world as an introduced species, including regions in Africa, India, Indonesia, Australia, Florida in the United States, and many Pacific Islands. Its distribution is now considered pantropical. In many places, such as New Caledonia, it has become an invasive species.
Setaria palmifolia is a species of grass known by the common names palmgrass, highland pitpit, hailans pitpit, short pitpit, broadleaved bristlegrass, and knotroot. In Spanish it is called pasto de palma and in Samoan vao 'ofe 'ofe. It is native to temperate and tropical Asia. It is known elsewhere as an introduced, and often invasive, species, including in Australia, New Zealand, many Pacific Islands, and the Americas.
Centaurea macrocephala is a species of flowering plant in the family Asteraceae, and a member of the thistle tribe, Cardueae (Cynareae). It has many common names, including bighead knapweed, big yellow centaurea, lemon fluff, yellow bachelor's button, yellow hardhat, and Armenian basketflower.
Verbena canadensis, commonly known as rose mock vervain, rose verbena, clump verbena or rose vervain is a perennial herbaceous flowering plant in the verbena family (Verbenaceae) with showy pink to purple flowers.. It is native to the eastern and south-central areas of the United States. This species is widely cultivated as an ornamental, and naturalized populations have been established outside its native range, such as in the northeastern U.S.
Verbena peruviana, the Peruvian mock vervain, is a species of flowering plant in the family Verbenaceae. It is native to Bolivia, southern Brazil, northern Argentina, Paraguay, and Uruguay, but not Peru, and has been introduced to scattered locations elsewhere, including the former Czechoslovakia, the US state of Illinois, and the Leeward Islands. Under the synonym Glandularia peruviana, its cultivar 'Balendpibi' has gained the Royal Horticultural Society's Award of Garden Merit.
Glandularia lilacina is a species of flowering plant in the verbena family known by the common name Cedros Island verbena. It is native to Cedros Island and the adjacent Baja California coast. It is a perennial herb growing to 3 feet tall by 3 feet wide, with erect stems, narrow and elongate bipinnatifid leaves. The plant is available in multiple cultivars for gardens.