Flora of North America species comparison

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Vernonia glauca

Appalachian ironweed, broad-leaf ironweed
Habit Plants 6–10+ dm.
Stems

sparsely appressed-puberulent, glabrescent.
Leaves

mostly cauline;

blades lanceolate to oblanceolate, 10–15(–18+) cm × 30–45(–70+) mm, l/w = 2.5–3.5(–4), abaxially scabrellous (hairs awl-shaped), resin-gland-dotted or not, adaxially glabrous or sparsely puberulent.
Peduncles

2–35 mm.
Involucres

± hemispheric, 5–8 × 7–8 mm.
Florets

30–45+.
Phyllaries

40–60 in 5–6 series, sparsely puberulent to tomentulose, glabrescent, margins ciliolate, the outer lance-deltate to subulate, 1–3 mm, inner oblong, 4–7+ mm, tips acuminate to subulate or filiform.
Heads

in corymbiform to paniculiform arrays.
Cypselae

3–4 mm;

pappi stramineous to whitish, outer subulate scales or bristles 30, 0.5–1.5+ mm, intergrading with 30+, 6–8 mm inner subulate scales or bristles.
2n

= 34.

Vernonia glauca
Phenology Flowering Jul–Sep.
Habitat Dry fields, marshes
Elevation 10–400 m (0–1300 ft)
Distribution
from FNA
AL; DC; DE; GA; MA; MD; NC; NJ; PA; SC; VA
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 209.
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. larseniae, V. lettermannii, V. lindheimeri, V. marginata, V. missurica, V. noveboracensis, V. pulchella, V. texana
Synonyms Serratula glauca
Name authority (Linnaeus) Willdenow: Sp. Pl. 3: 1633. (1803)
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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