Flora of North America species comparison

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Vernonia texana

Texas ironweed
Habit Plants 4–8(–10+) dm.
Stems

puberulent, glabrescent.
Leaves

basal and cauline;

blades ovate-lanceolate (basal) to narrowly lanceolate (distal), 5–12+ cm × (5–)12–25+ mm, l/w = 3–5 (basal) or 8–17 (distal), abaxially glabrate (pitted, awl-shaped hairs in pits), adaxially puberulent and/or scabrellous.
Peduncles

1–35 mm.
Heads

in open, paniculiform-scorpioid arrays.
Involucres

± obconic to hemispheric, 4.5–6 × 5–7 mm.
Florets

12–24+.
Phyllaries

35–45+ in 5–6+ series, glabrescent, margins arachno-ciliolate, the outer lance-deltate, 1–32 mm, inner oblong to linear, 4–5(–6) mm, tips acute or rounded-apiculate.
Cypselae

2–3 mm;

pappi usually whitish to stramineous (rarely purplish), outer scales or bristles 20+, 0.3–1+ mm, contrasting or intergrading with 20+, 6–7+ mm inner subulate scales or bristles.
2n

= 34.

Vernonia texana
Phenology Flowering Jun–Aug.
Habitat Pinelands, scrub oak woodlands, sandy or sandy-clay soils
Elevation 60–200 m [200–700 ft]
Distribution
from FNA
AR; LA; MS; OK; TX
[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. lindheimeri, V. marginata, V. missurica, V. noveboracensis, V. pulchella
Synonyms V. angustifolia var. texana
Name authority (A. Gray) Small: Fl. S.E. U.S., 1338. (1903)
Source Flora of North America vol. 19, p. 211.
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, Polemoniaceae, and Onagraceae.)

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