Desmanthus virgatus (L.) Willd.


Cite taxon page as 'WFO (2020): Desmanthus virgatus (L.) Willd. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000175857. Accessed on: 26 May 2020'

General Information

Por Melissa Luckow

Desmanthus virgatus (L.) Willd., Sp. Pl. 4: 1047. 1806; Mimosa virgata L.

Hierbas o subarbustos, raíz axonomorfa, inermes, postrados a erectos, 0.3–1 m de alto; plantas hermafroditas. Hojas bipinnadas, 1–7 cm de largo, pinnas 2–8 pares, 1–3.5 cm de largo, las del par inferior con una glándula cupuliforme, orbicular u obovada entre ellas; folíolos 10–25 pares, oblongo-lineares, 2–8 mm de largo, ciliados en los márgenes; estípulas setiformes. Inflorescencias capítulos axilares, pedúnculos 1–2.5 cm de largo, comúnmente con 6–9 flores, todas fértiles o algunas basales estériles, cada flor abrazada por una bractéola linear-subulada; cáliz campanulado, 2–3 mm de largo, 5-dentado; pétalos 5, libres, 3–4 mm de largo, unguiculados en la base, blancos; estambres 10, libres, exertos; ovario bilateral, glabro, subsésil, estigma truncado. Frutos 1–6 por capítulo, lineares, 2.5–7 cm de largo y 2.5–5 mm de ancho, glabros, dehiscentes a lo largo de las valvas; semillas 10–25, oblicuas en las vainas, lenticulares, 2–3.5 mm de diámetro.

Común, a menudo ruderal, zona pacífica; 0–800 m; fl y fr ago–ene; Stevens 3588, 5198; Estados Unidos (Florida y Texas) a Argentina, Galápagos, las Antillas e introducida en los trópicos del Viejo Mundo. Esta especie está muy ampliamente distribuida y presenta problemas taxonómicos difíciles. La mayoría de los especímenes de Nicaragua se pueden asignar fácilmente a una de las dos variedades siguientes: D. virgatus var. virgatus caracterizada por el hábito erecto, 0.5–1 m de alto o más, las hojas con 4–6 pinnas, la glándula 1–2 mm de largo y el fruto5–7 cm de largo (Stevens 5198); D. virgatus var. depressus (Humb. & Bonpl. ex Willd.) B.L. Turner caracterizada por el hábito postrado a débilmente ascendente, comúnmente menos de 0.5 m de alto, las hojas con 2–4 pinnas, las glándulas 0.2–1 mm de largo y el fruto 2.5–6 cm de largo (Stevens 3588). Género con ca 25 especies de las regiones templadas, subtropicales y tropicales de América.

  • Provided by: [F].Flora de Nicaragua
    • Source: [
    • 1
    • ]. 

    Small shrub or subherbaceous, nearly erect or more commonly diffuse or de- cumbent, the branchlets essentially glabrous, angled or subtetragonal, scarcely lenticellate. Leaves moderately small, bipinnate, the pinnae 1-7 (mostly 2-4) pairs opposite on the rachis, the leaflets mostly 10-20 pairs per pinna; petiole usually no more than 5 mm. long, subterete, perhaps ciliate above, bearing apically at insertion of the lowermost pair of pinnae a large or small, orbicular to obovate, cupulate or patelliform, sessile gland; rachis usually flattened and lightly pubescent or ciliate above, eglandular (except for gland already described at juncture of rachis and petiole), apiculate from the lower side apically; pinnae 1-4 cm. long; leaflets linear or linear-oblong, 2-8 mm. long and mostly 1-2 mm. wide, obtuse or rounded apically, obliquely truncate basally, glabrous except usually ciliate, the costa but not secondary veins visible; stipules setiform, mostly 3-5 mm. long. Inflorescence of axillary, pedunculate heads towards the tips of the twigs; pedun- cles up to 6 cm. long (in age), usually scatteringly pubescent; head small, dense, few-flowered, the flowers all erect; floral bractlets lanceolate, about 2 mm. long, subrigid. Flowers whitish, sessile; calyx cupular-tubular, 2-3 mm. long, glabrous or subglabrous, prominently dentate; corolla of 5 essentially free, obovate, glabrous petals 3-4 mm. long; stamens 10, free, glabrous, the filaments 6-7 mm. long; anthers ovate, almost 1 mm. long, glabrous; ovary linear-oblong, about 3 mm. long, curved, glabrous, bilateral; style about 5 mm. long, expanded apically into a truncate stigma. Legume linear, mostly 4-6 cm. long and 3-4 mm. wide, flat, glabrous, short-beaked, dehiscent on both valves, the seeds oblique.

  • Provided by: [C].Flora de Panama
    • Source: [
    • 2
    • ]. 

    Hierba postrada, rastrera, decumbente o erecta, 0.3–1(–1.5) m, muy ramificada desde la base; estípulas (0.1–)0.3–0.6 cm. Hojas con el pecíolo 0.1–0.6 cm; pinnas 2–5 pares; folíolos 11–23 pares por pinna, 0.24–0.7 X 0.07–0.16 cm, linear-oblongos, agudos u obtusos en el ápice. Infls. ca. 0.5 cm de diám., usualmente con algunas fls. proximales estériles; pedúnculo 0.6–4 cm. Fls. blancas a verdosas; cáliz 0.6–1.2 mm; corola 1.5–2 mm. Frs. 1–6 por capítulo, 2.2–6(–8) X 0.25–0.4 cm, rectos; semillas 9–27, 2.1–2.9 X 1.4–2.7 mm.

  • Provided by: [G].Manual de Plantas de Costa Rica
    • Source: [
    • 3
    • ]. 

    Morphology

    Unarmed perennial herb or suffrutex up to 1 m high; young stems ± angular owing to the prominent decurrent striations from the base of each petiole, subglabrous to sparingly puberulous. Leaves sparingly to densely puberulous: petiole 0.2-1.8 cm long, usually with a large flattened discoid or ellipsoid gland immediately below the junction of the lowest pinna pair; rhachis 1-5.5 cm long; pinnae 3-5(7) opposite pairs, rhachillae 1-4 cm long; leaflets 9-20 pairs, 3-8 x 0.8-1.5 mm, linear to linear-oblong, acute apically, glabrous throughout or with marginal cilia. Stipules setaceous, up to 5 mm long, linear, persistent. Flowers white to pale yellowish-white, in heads up to 0.8 cm in diameter; peduncles up to 5 cm long. Calyx campanulate, tube up to 2.5 mm long, lobes up to 1.5 mm long, glabrous. Petals free, up to 4 mm long, glabrous. Stamens 10, filaments free, linear, 5.5-7 mm long; anthers eglandular apically. Ovary subsessile, glabrous; style slightly thickened above. Pods dark brown, 4-8 cm long, up to 4 mm wide, linear, straight or slightly curved, thinly subcoriaceous, compressed, dehiscing longitudinally. Seeds up to 3 x 2 mm, slightly compressed, sometimes somewhat angular, lying ± obliquely in the pod, dark brown; areole small, up to 1.5 x 1 mm.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 4
    • ]. 

    Habit

    shrub

  • Provided by: [C].Flora de Panama
    • Source: [
    • 2
    • ]. 

    Distribution

    Florida and Texas to Argentina; West Indies; Galapagos; probably introduced elsewhere.

  • Provided by: [C].Flora de Panama
    • Source: [
    • 2
    • ]. 

    Natal. Found mainly in the tropics and subtropics of the New World.

  • Provided by: [E].e-Flora of South Africa
    • Source: [
    • 4
    • ]. 

    Distribution Map

     
    • Native distribution
    Found in
    • Southern America Brazil Bahia
    • Ceará
    • Paraába
    • Pernambuco
    • Paraní
    • Rio Grande do Sul
    • Santa Catarina
    • Espirito Santo
    • Minas Gerais
    • Rio de Janeiro
    • São Paulo
    • Mato Grosso do Sul

     Information From

    Fabaceae
    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    MBG Floras Images
    http://www.tropicos.org/ImageSearch.aspx
    Flora images. Missouri Botanical Garden. Accessed on Jun. 2018.
    • B Missouri Botanical Garden
    Flora de Panama
    http://www.tropicos.org/Project/PAC
    Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
    • C Missouri Botanical Garden
    Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    http://floradobrasil.jbrj.gov.br
    Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
    • D Group Brazil Flora, REFLORA Program
    e-Flora of South Africa
    e-Flora of South Africa. v1.21. 2018. South African National Biodiversity Institute. http://ipt.sanbi.org.za/iptsanbi/resource?r=flora_descriptions&v=1.21
    • E All Rights Reserved
    Flora de Nicaragua
    http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
    WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
    • F Missouri Botanical Garden
    Manual de Plantas de Costa Rica
    http://www.tropicos.org/Project/Costa%20Rica
    Hammel, B. E.; Grayum, M. H.; Herrera, C.; Zamora, N. Manual de Plantas de Costa Rica. Missouri Botanical Garden Press, 2003-2014
    • G Missouri Botanical Garden
    World Flora Online consortium
    http://www.worldfloraonline.org/organisation/WFO
    World Flora Online Data. 2018.
    • H CC0 1.0 Universal (CC0 1.0).