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tall ironweed

Habit Plants 5–10+ dm.
Stems

sparsely appressed-puberulent, glabrescent.

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.

Peduncles

8–25 mm.

Heads

in ± corymbiform to paniculiform arrays.

Involucres

± campanulate to obconic, 5–7(–10) × 4–6(–9) mm.

Florets

12–20(–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.

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.

2n

= 34.

Vernonia angustifolia

Phenology Flowering Jun–Aug.
Habitat Pine barrens, oak woodlands
Elevation 10–50 m [0–200 ft]
Distribution
from FNA
AL; FL; GA; LA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
Parent taxa Asteraceae > tribe Vernonieae > Vernonia
Sibling taxa
V. acaulis, V. arkansana, V. baldwinii, V. blodgettii, V. fasciculata, V. flaccidifolia, V. gigantea, V. glauca, V. larseniae, V. lettermannii, V. lindheimeri, V. marginata, V. missurica, V. noveboracensis, V. pulchella, V. texana
Synonyms V. angustifolia subsp. mohrii, V. angustifolia subsp. scaberrima, V. angustifolia var. scaberrima, V. scaberrima
Name authority Michaux: Fl. Bor.-Amer. 2: 94. (1803)
Source Flora of North America vol. 19, p. 209.
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