Vernonia angustifolia |
Vernonia pulchella |
|
---|---|---|
tall ironweed |
Georgia ironweed |
|
Habit | Plants 5–10+ dm. | Plants 4–7+ dm. |
Stems | sparsely appressed-puberulent, glabrescent. |
sparsely appressed-puberulent. |
Leaves | mostly cauline; blades (mid stem) lance-linear to filiform, 5–12 cm × 2–4(–8+) mm, l/w = (8–)12–30(–60+), abaxially glabrous but for scattered hairs on midribs or scabrellous (hairs awl-shaped), resin-gland-dotted or not, adaxially scabrellous. |
mostly cauline; blades (mid stem) mostly oblanceolate to lance-linear, rarely ovate, 3–7 cm × (5–)10–20+ mm, l/w = (2.5–)3.5–6+ (bases rounded-truncate), abaxially scabrellous (hairs awl-shaped), resin-gland-dotted, adaxially scabrellous. |
Peduncles | 8–25 mm. |
5–35 mm. |
Involucres | ± campanulate to obconic, 5–7(–10) × 4–6(–9) mm. |
± campanulate, 6–11 × 5–9 mm. |
Florets | 12–20(–30). |
14–25(–30+). |
Phyllaries | 22–45+ in 5–6 series, sparsely scabrellous, glabrescent, margins ciliolate, the outer lanceolate to subulate, 1.5–3 mm, inner lance-ovate to lanceolate, 5–9+ mm, tips acuminate to subulate. |
40–50+ in 5–6 series, sparsely puberulent, margins arachno-ciliate, the outer subulate to filiform, 3–7 mm, inner lance-attenuate to filiform, 9–10+ mm, tips subulate to filiform. |
Heads | in ± corymbiform to paniculiform arrays. |
in ± corymbiform to paniculiform arrays. |
Cypselae | 2.5–3 mm; pappi stramineous to purplish, outer scales 25–30, 0.5–1.2+ mm, contrasting with 35–40+, 5.5–6+ mm inner bristles. |
3–3.5 mm; pappi stramineous, outer scales 25–30, 0.6–1.1 mm, contrasting with 30+, 6–7+ mm inner bristles. |
2n | = 34. |
= 34. |
Vernonia angustifolia |
Vernonia pulchella |
|
Phenology | Flowering Jun–Aug. | Flowering Jul–Sep. |
Habitat | Pine barrens, oak woodlands | Low, wet places in pine woods |
Elevation | 10–50 m (0–200 ft) | 20–50 m (100–200 ft) |
Distribution |
AL; FL; GA; LA; MS; NC; SC
|
GA; SC |
Source | FNA vol. 19, p. 209. | FNA vol. 19, p. 209. |
Parent taxa | Asteraceae > tribe Vernonieae > Vernonia | Asteraceae > tribe Vernonieae > Vernonia |
Sibling taxa | ||
Synonyms | V. angustifolia subsp. mohrii, V. angustifolia subsp. scaberrima, V. angustifolia var. scaberrima, V. scaberrima | |
Name authority | Michaux: Fl. Bor.-Amer. 2: 94. (1803) | Small: Bull. Torrey Bot. Club 25: 145. (1898) |
Web links |