Verbesina rothrockii |
Verbesina alternifolia |
|
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Rothrock's crownbeard |
wingstem, wingstem crownbeard |
|
Habit | Plants 30–60+ cm (perennating bases ± erect, internodes not winged). | Plants (30–)100–200+ cm (perennating bases ± erect or horizontal rhizomes, internodes winged, at least proximal). |
Leaves | all or mostly opposite (distal sometimes alternate); blades ovate-deltate or rhombic to lance-elliptic, 3–5 × 1–3 cm, bases subtruncate to cuneate, margins coarsely toothed to subentire, apices obtuse to acute, faces ± hirtellous to scabrellous. |
all or mostly alternate (proximal sometimes opposite); blades lance-elliptic or lanceolate to lance-linear, 10–25+ × 2–8+ cm, bases narrowly cuneate, margins coarsely toothed to subentire, apices attenuate, faces scabrellous. |
Involucres | ± hemispheric, 10–15+ mm diam. |
± saucerlike, 10–12+ mm diam. |
Ray florets | 8–13; laminae 15–25+ mm. |
(2–)6–8+; laminae 15–25+ mm. |
Disc florets | 60–100+; corollas yellow. |
40–60+; corollas yellow. |
Phyllaries | 18–30+ in 3–4 series, ± erect, oblong to elliptic, 6–10+ mm. |
8–12+ in 1(–2) series, ± spreading to reflexed, spatulate or lance-linear to linear, 3–8+ mm. |
Heads | borne singly. |
(3–)8–25(–50+) in corymbiform to paniculiform arrays. |
Cypselae | dark brown, ± elliptic, 10 mm, faces glabrous; pappi 0–0.5 mm. |
dark brown to black, oblanceolate to ± orbiculate, 4.5–5 mm, faces sparsely hirtellous to glabrate; pappi 1.5–2 mm. |
2n | = 34. |
= 68. |
Verbesina rothrockii |
Verbesina alternifolia |
|
Phenology | Flowering (May–)Aug–Sep. | Flowering Aug–Oct. |
Habitat | Rocky slopes, igneous or limestone substrates | Alluvial flats, along streams, woodlands |
Elevation | 1200–1800 m (3900–5900 ft) | 10–600 m (0–2000 ft) |
Distribution |
AZ; NM; Mexico (Coahuila, Durango, Zacatecas)
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AL; AR; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MI; MO; MS; NC; NE; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; WI; WV; ON
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Discussion | Verbesina alternifolia may be no longer present in Delaware. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 21, p. 111. | FNA vol. 21, p. 108. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Verbesina | Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Verbesina |
Sibling taxa | ||
Synonyms | Coreopsis alternifolia | |
Name authority | B. L. Robinson & Greenman: Proc. Amer. Acad. Arts 34: 541. (1899) | (Linnaeus) Britton ex Kearney: Bull. Torrey Bot. Club 20: 485. (1893) |
Web links |