Vernonia missurica |
Vernonia noveboracensis |
|
---|---|---|
Missouri ironweed |
New York ironweed |
|
Habit | Plants 6–12(–20+) dm. | Plants 8–12(–20) dm. |
Stems | puberulent. |
puberulent, glabrescent. |
Leaves | mostly cauline; blades elliptic to lance-ovate or lanceolate, 6–16(–20+) cm × 18–48+ mm, l/w = 2.5–4(–6+), abaxially usually puberulent to tomentose or pannose (hairs ± erect, ± curled), seldom glabrate, resin-gland-dotted, adaxially scabrellous, glabrescent, not resin-gland-dotted. |
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 | 3–35 mm. |
2–35 mm. |
Involucres | broadly campanulate to urceolate, (6–)7–10+ × 5–9+ mm. |
± hemispheric, 6–10 × 7–10 mm. |
Florets | 30–55+. |
30–45(–65). |
Phyllaries | 50–70+ in 6–7 series, sparsely scabrellous, glabrescent (seldom resin-gland-dotted), margins ciliolate, the outer lanceolate, 1–2 mm, inner linear-oblong to oblong, 6–7(–9+) 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 corymbiform-scorpioid arrays. |
in corymbiform to paniculiform arrays. |
Cypselae | 3.5–4; pappi stramineous to whitish, outer scales 25–30, 0.5–1.1 mm, contrasting with 35–40+, 6–8+ mm inner 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 missurica |
Vernonia noveboracensis |
|
Phenology | Flowering Jul–Sep. | Flowering Aug–Oct. |
Habitat | Prairies, loamy to sandy soils | Abandoned fields, marshes, roadsides |
Elevation | 30–200 m (100–700 ft) | 10–600 m (0–2000 ft) |
Distribution |
AL; AR; GA; IA; IL; IN; KS; KY; LA; MI; MO; MS; OK; TN; TX
|
AL; CT; DC; DE; FL; GA; MA; MD; NC; NJ; NY; PA; RI; SC; TN; VA; WV
|
Source | FNA vol. 19, p. 212. | FNA vol. 19, p. 209. |
Parent taxa | Asteraceae > tribe Vernonieae > Vernonia | Asteraceae > tribe Vernonieae > Vernonia |
Sibling taxa | ||
Synonyms | Serratula noveboracensis, V. harperi, V. noveboracensis var. tomentosa | |
Name authority | Rafinesque: Herb. Raf., 28. (1833) | (Linnaeus) Michaux: Fl. Bor.-Amer. 2: 95. (1803) |
Web links |