Isocoma pluriflora |
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rayless goldenrod, southern goldenbush, southern jimmyweed |
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Herbage | usually glabrous or sparsely hispidulous, sometimes densely hirtellous, leaves sometimes stipitate-glandular, never resinous. |
Leaf | blades oblanceolate to narrowly oblong-oblanceolate or nearly linear, mostly 10–40(–50) mm, margins usually entire (hispidulous-cilate, sometimes also on faces), sometimes shallowly toothed distally (especially along western margin of range; teeth in 1(–3) pairs). |
Involucres | 3.2–5.5 × 2.5–4 mm. |
Florets | (8–)11–17(–21); corollas 5–6 mm. |
Phyllary | apices yellowish, or if green, then margins scarious, not aristate, gland-dotted, without resin pockets. |
Cypsela | ribs not forming hornlike extensions. |
2n | = 12, 24. |
Isocoma pluriflora |
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Phenology | Flowering (Apr–)Jul–Oct. |
Habitat | Igneous or calcareous substrates, sometimes over gypsum, sandy or clay loam, commonly with Larrea-Prosopis |
Elevation | 400–1400(–1600) m (1300–4600(–5200) ft) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Coahuila)
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Discussion | Like other species of Isocoma, I. pluriflora usually is gland-dotted, but scattered plants are stipitate-glandular. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 445. |
Parent taxa | Asteraceae > tribe Astereae > Isocoma |
Sibling taxa | |
Synonyms | Linosyris pluriflora, Haplopappus heterophyllus, Haplopappus pluriflorus, I. wrightii |
Name authority | (Torrey & A. Gray) Greene: Erythea 2: 111. (1894) |
Web links |