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woolly ironweed

Missouri ironweed

Habit Plants 2–5(–8+) dm. Plants 6–12(–20+) dm.
Stems

± pannose.

puberulent.

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.

mostly cauline;

blades elliptic to lance-ovate or lanceolate, 6–16(–20+) cm × 18–48+ mm, l/w = 2.5–4(–6+), abaxially usually puberulent to tomentose or pannose (hairs ± erect, ± curled), seldom glabrate, resin-gland-dotted, adaxially scabrellous, glabrescent, not resin-gland-dotted.

Peduncles

5–35 mm.

3–35 mm.

Involucres

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

broadly campanulate to urceolate, (6–)7–10+ × 5–9+ mm.

Florets

12–24+.

30–55+.

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.

50–70+ in 6–7 series, sparsely scabrellous, glabrescent (seldom resin-gland-dotted), margins ciliolate, the outer lanceolate, 1–2 mm, inner linear-oblong to oblong, 6–7(–9+) mm, tips acute or rounded-apiculate.

Heads

in corymbiform arrays.

in corymbiform-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.

3.5–4;

pappi stramineous to whitish, outer scales 25–30, 0.5–1.1 mm, contrasting with 35–40+, 6–8+ mm inner bristles.

2n

= 34.

= 34.

Vernonia lindheimeri

Vernonia missurica

Phenology Flowering Jun–Aug. Flowering Jul–Sep.
Habitat Calcareous soils, rocky banks Prairies, loamy to sandy soils
Elevation 300 m (1000 ft) 30–200 m (100–700 ft)
Distribution
from FNA
AR; TX; Mexico (Coahuila)
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; GA; IA; IL; IN; KS; KY; LA; MI; MO; MS; OK; TN; TX
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 210. 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. 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. noveboracensis, V. pulchella, V. texana
Name authority A. Gray & Engelmann: Proc. Amer. Acad. Arts 1: 46. (1847) Rafinesque: Herb. Raf., 28. (1833)
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