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woolly ironweed

Texas ironweed

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

± pannose.

puberulent, glabrescent.

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.

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

5–35 mm.

1–35 mm.

Involucres

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

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

Florets

12–24+.

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.

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.

Heads

in corymbiform arrays.

in open, paniculiform-scorpioid 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.

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.

= 34.

Vernonia lindheimeri

Vernonia texana

Phenology Flowering Jun–Aug. Flowering Jun–Aug.
Habitat Calcareous soils, rocky banks Pinelands, scrub oak woodlands, sandy or sandy-clay soils
Elevation 300 m (1000 ft) 60–200 m (200–700 ft)
Distribution
from FNA
AR; TX; Mexico (Coahuila)
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; LA; MS; OK; TX
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 210. FNA vol. 19, p. 211.
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. marginata, V. missurica, V. noveboracensis, V. pulchella, V. texana
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 & Engelmann: Proc. Amer. Acad. Arts 1: 46. (1847) (A. Gray) Small: Fl. S.E. U.S., 1338. (1903)
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