Flora of North America species comparison

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Vernonia texana

Vernonia blodgettii

Texas ironweed

Florida ironweed
Habit Plants 4–8(–10+) dm. Plants 2–3(–5+) dm.
Stems

puberulent, glabrescent.

glabrous or glabrate.
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.

mostly cauline;

blades lance-linear to linear, 3–7+ cm × 2–8+ mm, l/w = 7–15+, abaxially scabrellous (hairs appressed, awl-shaped), resin-gland-dotted, adaxially scabrellous, glabrescent, resin-gland-dotted.
Peduncles

1–35 mm.

12–35 mm.
Involucres

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

campanulate to obconic, 6–8 × 6–10 mm.
Florets

12–24+.

18–25+.
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.

30–40+ in 4–5 series, puberulent, margins arachno-ciliate, the outer lance-ovate, 2–3 mm, inner lance-oblong to linear-oblong, 6–7 mm, tips acute or rounded-apiculate.
Heads

in open, paniculiform-scorpioid arrays.

in open, corymbiform to paniculiform arrays.
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.

2.5–3+ mm;

pappi stramineous to whitish, outer scales 25–30, 0.5–1.1 mm, contrasting with 30–40+, 5–7+ mm inner bristles.
2n

= 34.

= 34.

Vernonia texana

Vernonia blodgettii
Phenology Flowering Jun–Aug. Flowering year-round.
Habitat Pinelands, scrub oak woodlands, sandy or sandy-clay soils Damp, peaty or sandy soils
Elevation 60–200 m (200–700 ft) 0–10 m (0–0 ft)
Distribution
from FNA
AR; LA; MS; OK; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
FL; West Indies (Bahamas)
[BONAP county map]
Source FNA vol. 19, p. 211. FNA vol. 19, p. 212.
Parent taxa Asteraceae > tribe Vernonieae > Vernonia 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
V. acaulis, V. angustifolia, V. arkansana, V. baldwinii, V. fasciculata, V. flaccidifolia, V. gigantea, V. glauca, V. larseniae, V. lettermannii, V. lindheimeri, V. marginata, V. missurica, V. noveboracensis, V. pulchella, V. texana
Synonyms V. angustifolia var. texana
Name authority (A. Gray) Small: Fl. S.E. U.S., 1338. (1903) Small: Fl. S.E. U.S., 1160, 1338. (1903)
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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