The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Missouri ironweed

Habit Plants 6–12(–20+) dm.
Stems

puberulent.

Leaves

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

3–35 mm.

Involucres

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

Florets

30–55+.

Phyllaries

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-scorpioid arrays.

Cypselae

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.

Vernonia missurica

Phenology Flowering Jul–Sep.
Habitat Prairies, loamy to sandy soils
Elevation 30–200 m (100–700 ft)
Distribution
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. 212.
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. noveboracensis, V. pulchella, V. texana
Name authority Rafinesque: Herb. Raf., 28. (1833)
Web links