Vernonia lindheimeri |
Vernonia marginata |
|
---|---|---|
woolly ironweed |
ironplant, plains ironweed |
|
Habit | Plants 2–5(–8+) dm. | Plants 3–5(–8+) dm. |
Stems | ± pannose. |
puberulent, glabrescent. |
Leaves | mostly cauline; blades linear, 5–8 cm × 2–4 mm, l/w = 17–25(–40), abaxially densely sericeo-tomentose, adaxially usually glabrate, sometimes sparsely arachno-tomentose. |
mostly cauline; blades narrowly lanceolate to lance-linear, 5–15+ cm × (2.5–)8–12+ mm, l/w = 8–20(–30+), abaxially glabrate (pitted, awl-shaped hairs in pits), adaxially puberulent, glabrescent (sometimes pitted). |
Peduncles | 5–35 mm. |
(3–)10–35 mm. |
Involucres | ± obconic to campanulate, 6–10 × 5–8 mm. |
narrowly campanulate, (7–)9–11 × 5–6 mm. |
Florets | 12–24+. |
10–25+. |
Phyllaries | 40–50+ in 5–6+ series, sericeo-tomentose, including margins, the outer lance-ovate, 1–2 mm, the inner lanceolate to lance-linear, 6–7(–9+) mm, tips acute. |
35–40+ in 5–6+ series, glabrescent, margins arachno-ciliolate, the outer lance-ovate, 1–2 mm, inner oblong to linear-oblong, 6–9+ mm, tips ± acuminate. |
Heads | in corymbiform arrays. |
in corymbiform arrays. |
Cypselae | 3–4 mm; pappi stramineous to purplish, outer scales 20+, 0.6–1.1 mm, contrasting with 20+, 6–7+ mm inner bristles. |
4–5 mm; pappi stramineous to purplish, outer subulate scales or bristles 30+, 0.6–2+ mm, intergrading with 40+, 8–9+ mm inner subulate scales or bristles. |
2n | = 34. |
= 34. |
Vernonia lindheimeri |
Vernonia marginata |
|
Phenology | Flowering Jun–Aug. | Flowering Jul–Aug. |
Habitat | Calcareous soils, rocky banks | Ditches, sandy flats, stream banks |
Elevation | 300 m (1000 ft) | 600–2000 m (2000–6600 ft) |
Distribution |
AR; TX; Mexico (Coahuila)
|
CO; KS; NM; OK; TX; Mexico (Coahuila)
|
Source | FNA vol. 19, p. 210. | FNA vol. 19, p. 211. |
Parent taxa | Asteraceae > tribe Vernonieae > Vernonia | Asteraceae > tribe Vernonieae > Vernonia |
Sibling taxa | ||
Synonyms | V. altissima var. marginata | |
Name authority | A. Gray & Engelmann: Proc. Amer. Acad. Arts 1: 46. (1847) | (Torrey) Rafinesque: Atlantic J. 1: 146. (1832) |
Web links |