Ageratina thyrsiflora (Greene) R.M.King & H.Rob.

Species

Angiosperms > Asterales > Asteraceae > Ageratina

Characteristics

Perennials or subshrubs, 50–100 cm. Stems erect (usually forming compact ‘bushlets’), finely and evenly puberulent (hairs minute, bent). Leaves usually alternate, sometimes subopposite (densely overlapping internodes); petioles 3–20 mm; blades ovate-lanceolate to triangular, 2.5–6.5 × 1–2.5(–3) cm, bases obtuse to cuneate, margins shallowly and coarsely crenate to serrate to subentire, apices rounded-obtuse, abaxial faces hirtellous. Heads clustered (in dense, terminal aggregates). Peduncles 3–8 mm, puberulent. Involucres 2.5–3 mm. Phyllaries: apices acute to obtuse (dark orange-veined), abaxial faces. Corollas white (orange-veined), glabrous. Cypselae hispid.
Life form perennial
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Foliage retention deciduous
Sexuality hermaphrodite
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Hardiness (USDA) 8-12

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Cultivation

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Distribution

Ageratina thyrsiflora world distribution map, present in Mexico and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:7049-2
WFO ID wfo-0000053471
COL ID 65RXF
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Eupatorium thyrsiflorum Kyrstenia thyrsiflora Eupatorium thyrsiflorum var. thyrsiflorum Ageratina thyrsiflora