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tall ironweed

woolly ironweed

Habit Plants 5–10+ dm. Plants 2–5(–8+) dm.
Stems

sparsely appressed-puberulent, glabrescent.

± pannose.

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 linear, 5–8 cm × 2–4 mm, l/w = 17–25(–40), abaxially densely sericeo-tomentose, adaxially usually glabrate, sometimes sparsely arachno-tomentose.

Peduncles

8–25 mm.

5–35 mm.

Involucres

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

± obconic to campanulate, 6–10 × 5–8 mm.

Florets

12–20(–30).

12–24+.

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, sericeo-tomentose, including margins, the outer lance-ovate, 1–2 mm, the inner lanceolate to lance-linear, 6–7(–9+) mm, tips acute.

Heads

in ± corymbiform to paniculiform arrays.

in corymbiform 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.

3–4 mm;

pappi stramineous to purplish, outer scales 20+, 0.6–1.1 mm, contrasting with 20+, 6–7+ mm inner bristles.

2n

= 34.

= 34.

Vernonia angustifolia

Vernonia lindheimeri

Phenology Flowering Jun–Aug. Flowering Jun–Aug.
Habitat Pine barrens, oak woodlands Calcareous soils, rocky banks
Elevation 10–50 m (0–200 ft) 300 m (1000 ft)
Distribution
from FNA
AL; FL; GA; LA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; TX; Mexico (Coahuila)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 209. FNA vol. 19, p. 210.
Parent taxa Asteraceae > tribe Vernonieae > Vernonia 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
V. acaulis, V. angustifolia, V. arkansana, V. baldwinii, V. blodgettii, V. fasciculata, V. flaccidifolia, V. gigantea, V. glauca, V. larseniae, V. lettermannii, 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) A. Gray & Engelmann: Proc. Amer. Acad. Arts 1: 46. (1847)
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