Flora of North America species comparison

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Vernonia lindheimeri

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.
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.
Heads

in corymbiform arrays.
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]
Source FNA vol. 19, p. 210.
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)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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