Vernonia texana |
Vernonia noveboracensis |
|
---|---|---|
Texas ironweed |
New York ironweed |
|
Habit | Plants 4–8(–10+) dm. | Plants 8–12(–20) dm. |
Stems | puberulent, glabrescent. |
puberulent, glabrescent. |
Leaves | basal and cauline; blades ovate-lanceolate (basal) to narrowly lanceolate (distal), 5–12+ cm × (5–)12–25+ mm, l/w = 3–5 (basal) or 8–17 (distal), abaxially glabrate (pitted, awl-shaped hairs in pits), adaxially puberulent and/or scabrellous. |
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. |
Peduncles | 1–35 mm. |
2–35 mm. |
Involucres | ± obconic to hemispheric, 4.5–6 × 5–7 mm. |
± hemispheric, 6–10 × 7–10 mm. |
Florets | 12–24+. |
30–45(–65). |
Phyllaries | 35–45+ in 5–6+ series, glabrescent, margins arachno-ciliolate, the outer lance-deltate, 1–32 mm, inner oblong to linear, 4–5(–6) mm, tips acute or rounded-apiculate. |
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. |
Heads | in open, paniculiform-scorpioid arrays. |
in corymbiform to paniculiform arrays. |
Cypselae | 2–3 mm; pappi usually whitish to stramineous (rarely purplish), outer scales or bristles 20+, 0.3–1+ mm, contrasting or intergrading with 20+, 6–7+ mm inner subulate scales or bristles. |
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. |
2n | = 34. |
= 34. |
Vernonia texana |
Vernonia noveboracensis |
|
Phenology | Flowering Jun–Aug. | Flowering Aug–Oct. |
Habitat | Pinelands, scrub oak woodlands, sandy or sandy-clay soils | Abandoned fields, marshes, roadsides |
Elevation | 60–200 m (200–700 ft) | 10–600 m (0–2000 ft) |
Distribution |
AR; LA; MS; OK; TX
|
AL; CT; DC; DE; FL; GA; MA; MD; NC; NJ; NY; PA; RI; SC; TN; VA; WV
|
Source | FNA vol. 19, p. 211. | FNA vol. 19, p. 209. |
Parent taxa | Asteraceae > tribe Vernonieae > Vernonia | Asteraceae > tribe Vernonieae > Vernonia |
Sibling taxa | ||
Synonyms | V. angustifolia var. texana | Serratula noveboracensis, V. harperi, V. noveboracensis var. tomentosa |
Name authority | (A. Gray) Small: Fl. S.E. U.S., 1338. (1903) | (Linnaeus) Michaux: Fl. Bor.-Amer. 2: 95. (1803) |
Web links |