Vernonia noveboracensis |
Vernonia marginata |
|
---|---|---|
New York ironweed |
ironplant, plains ironweed |
|
Habit | Plants 8–12(–20) dm. | Plants 3–5(–8+) dm. |
Stems | puberulent, glabrescent. |
puberulent, glabrescent. |
Leaves | mostly cauline; blades ± lanceolate, 9–15(–25+) cm × 15–45(–60+) mm, l/w = (3.3–)4–6+, abaxially scabrellous, tomentose, or pannose, resin-gland-dotted, adaxially scabrellous, often resin-gland-dotted. |
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 | 2–35 mm. |
(3–)10–35 mm. |
Involucres | ± hemispheric, 6–10 × 7–10 mm. |
narrowly campanulate, (7–)9–11 × 5–6 mm. |
Florets | 30–45(–65). |
10–25+. |
Phyllaries | 35–60+ in 4–6+ series, sparsely tomentulose, glabrescent, margins ciliolate, the outer lanceolate to subulate, 1–3 mm, inner oblong, 7–9+ mm, tips subulate to filiform. |
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 to paniculiform arrays. |
in corymbiform arrays. |
Cypselae | 3.5–4+ mm; pappi fuscous to purplish, outer scales 20, 0.2–0.6+ mm, contrasting with 30–40+, 5–7+ 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 noveboracensis |
Vernonia marginata |
|
Phenology | Flowering Aug–Oct. | Flowering Jul–Aug. |
Habitat | Abandoned fields, marshes, roadsides | Ditches, sandy flats, stream banks |
Elevation | 10–600 m (0–2000 ft) | 600–2000 m (2000–6600 ft) |
Distribution |
AL; CT; DC; DE; FL; GA; MA; MD; NC; NJ; NY; PA; RI; SC; TN; VA; WV
|
CO; KS; NM; OK; TX; Mexico (Coahuila)
|
Source | FNA vol. 19, p. 209. | FNA vol. 19, p. 211. |
Parent taxa | Asteraceae > tribe Vernonieae > Vernonia | Asteraceae > tribe Vernonieae > Vernonia |
Sibling taxa | ||
Synonyms | Serratula noveboracensis, V. harperi, V. noveboracensis var. tomentosa | V. altissima var. marginata |
Name authority | (Linnaeus) Michaux: Fl. Bor.-Amer. 2: 95. (1803) | (Torrey) Rafinesque: Atlantic J. 1: 146. (1832) |
Web links |