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Missouri ironweed

New York ironweed

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

puberulent.

puberulent, glabrescent.

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.

mostly cauline;

blades ± lanceolate, 9–15(–25+) cm × 15–45(–60+) mm, l/w = (3.3–)4–6+, abaxially scabrellous, tomentose, or pannose, resin-gland-dotted, adaxially scabrellous, often resin-gland-dotted.

Peduncles

3–35 mm.

2–35 mm.

Involucres

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

± hemispheric, 6–10 × 7–10 mm.

Florets

30–55+.

30–45(–65).

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.

35–60+ in 4–6+ series, sparsely tomentulose, glabrescent, margins ciliolate, the outer lanceolate to subulate, 1–3 mm, inner oblong, 7–9+ mm, tips subulate to filiform.

Heads

in corymbiform-scorpioid arrays.

in corymbiform to paniculiform 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.

3.5–4+ mm;

pappi fuscous to purplish, outer scales 20, 0.2–0.6+ mm, contrasting with 30–40+, 5–7+ mm inner bristles.

2n

= 34.

= 34.

Vernonia missurica

Vernonia noveboracensis

Phenology Flowering Jul–Sep. Flowering Aug–Oct.
Habitat Prairies, loamy to sandy soils Abandoned fields, marshes, roadsides
Elevation 30–200 m (100–700 ft) 10–600 m (0–2000 ft)
Distribution
from FNA
AL; AR; GA; IA; IL; IN; KS; KY; LA; MI; MO; MS; OK; TN; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; CT; DC; DE; FL; GA; MA; MD; NC; NJ; NY; PA; RI; SC; TN; VA; WV
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 19, p. 212. FNA vol. 19, p. 209.
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. 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. pulchella, V. texana
Synonyms Serratula noveboracensis, V. harperi, V. noveboracensis var. tomentosa
Name authority Rafinesque: Herb. Raf., 28. (1833) (Linnaeus) Michaux: Fl. Bor.-Amer. 2: 95. (1803)
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