Erigeron bonariensis L.

Compositae, C. D. Adams. Flora of West Tropical Africa 2. 1963

Morphology General Habit

An erect herb up to 18 in. high

Ecology

In waste ground.

Bernal, R., G. Galeano, A. Rodríguez, H. Sarmiento y M. Gutiérrez. 2017. Nombres Comunes de las Plantas de Colombia. http://www.biovirtual.unal.edu.co/nombrescomunes/

Vernacular

juamparao, varejón, venadillo, yerba de caballo

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: not threatened. Confidence: confident

The Useful Plants of Boyacá project

Morphology General Habit

Herb.

Conservation

Least concern.

Distribution

Introduced in Colombia.

Ecology

Alt. 100 - 3900 m.

Morphology Reproductive morphology Seeds Protein Content

26.40% Entire seed/nut. Moisture content not stated (Barclay & Earle, 1974)

Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005

Morphology General Habit

Annual herb 0.4–1.5(–2) m high; stems erect, simple or branched, cylindrical, striate, densely pubescent to scabrid.

Morphology Leaves

Leaves pale grey-green, sessile, linear to narrowly lanceolate or rarely pinnatilobed, 2.5–15 cm long, 0.2–3 cm wide, base cuneate, margins entire or dentate, apex acute, scabrid-pubescent on both surfaces and particularly on the veins and margins, the upper leaves or inflorescence bracts also glandular.

Morphology Reproductive morphology Inflorescences Capitulum

Capitula 4–8 mm long, grouped in terminal lax leafy panicles of 10 or more cymes of several laxly arranged capitula; stalks of individual capitula 0.2–3 cm long, scabrid-pubescent; phyllaries pale green, occasionally with red or purple apex, 2–3-seriate, ± 40, 1.5–5.6 mm long, 0.2–0.5 mm wide, with or without hyaline margins, pubescent; receptacle flat or slightly convex, not or slightly toothed.

Morphology Reproductive morphology Flowers Florets

Marginal florets whitish or cream with pink to purple tips, 60 to several hundred, tube 2.5–3.3 mm long and glabrous or slightly pilose, ray erect and 0.4–0.6 mm long and 2–3-toothed at apex, style 3.4–4.2 mm long; central florets white to yellow, 4–17, tube 2.8–3.5 mm long, lobes 0.3–0.7 mm long; anthers 0.7–1.1 mm long with narrowly triangular to filiform appendage; style 3.3–4.4 mm long with short, slightly swollen, papillose branches.

Morphology Reproductive morphology Fruits

Achenes oblong-cylindrical, flattened or not, 1–2 mm long, 2-ribbed, pilose to pubescent; pappus of many white to pale yellow setae 2.5–5 mm long.

Figures

Fig. 105 (page 507).

Habitat

Grasslands, roadsides or pathsides, in cultivated areas or fallow land; on loam, sand or lava; 300–2850 m

Distribution

K1 K2 K3 K4 K5 K6 K7 T1 T2 T3 T4 T5 T6 T7 pantropical weed, originally from S America, and widespread in tropical AfricaArabia

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution

Adventicia en Colombia; Alt. 100 - 3900 m.; Andes, Llanura del Caribe, Orinoquia, Valle del Cauca, Valle del Magdalena.

Morphology General Habit

Hierba

Conservation

Preocupación Menor

Ghazanfar, S. A., Edmondson, J. R. & Hind, D. J. N. (Eds). (2019). Flora of Iraq, Volume 6: Compositae.Kew Publishing

Morphology General Habit

Erect annual up to 60 cm tall, greyish, stems with a mixed indumentum of short appressed and longer patent hairs

Morphology Leaves

Leaves linear, lanceolate or oblanceolate, 1–8(–10) × 0.2–2 cm, appressed-pubescentandscabridulous, upperusually entireandlower broaderandirregularly jaggedly toothed or lobed

Morphology Reproductive morphology Inflorescences

Inflorescence an elongate panicle, overtopped by subsequent lateral branches, capitula few to many

Morphology Reproductive morphology Inflorescences Bracts Phyllaries

Phyllaries linear to narrowly lanceolate, 2.5–5 mm

Morphology Reproductive morphology Flowers Florets

Marginal florets female, filiform, sharply lobed or minutely ligulate at tip; disc-florets hermaphrodite, corolla yellow, 5–lobed

Morphology Reproductive morphology Fruits

Achenes 1.25–1.5 mm, narrowly oblong, sparsely shortly hairy; pappus setae straw-coloured, 3–3.5(–4) mm.

Ecology

A weed of cultivation (especially where irrigated), waysides and disturbed ground; alt. s.l.-250 m; fl. & fr. almost throughout the year.

Distribution

Quite common on the alluvial plain of Iraq, occasional in the foothills. A native of S America now widespread in the warmer regions of the world as an introduced and naturalized weed.

Distribution

Found in Boyacá, Colombia.

Vernacular

Juamparao, Varejón, Venadillo, Yerba de caballo

Use Medicines Unspecified Medicinal Disorders

Medicinal (Instituto Humboldt 2014).