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woolly ironweed

Habit Plants 2–5(–8+) dm.
Stems

± pannose.

Leaves

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

5–35 mm.

Heads

in corymbiform arrays.

Involucres

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

Florets

12–24+.

Phyllaries

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.

Cypselae

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.

Vernonia lindheimeri

Phenology Flowering Jun–Aug.
Habitat Calcareous soils, rocky banks
Elevation 300 m [1000 ft]
Distribution
from FNA
AR; TX; Mexico (Coahuila)
[WildflowerSearch map]
[BONAP county map]
Parent taxa Asteraceae > tribe Vernonieae > Vernonia
Sibling taxa
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
Name authority A. Gray & Engelmann: Proc. Amer. Acad. Arts 1: 46. (1847)
Source Flora of North America vol. 19, p. 210.
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