Picradeniopsis oppositifolia |
Picradeniopsis |
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oppositeleaf bahia, plains bahia |
bahia |
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Habit | Plants ± erect or spreading, 3–15(–20+) cm. | Perennials, 3–20+ cm (± rhizomatous, sometimes forming colonies). | ||||
Stems | ± erect or spreading, branched ± throughout. |
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Leaves | lobes lanceolate to linear, 10–25+ × 1–3(–8) mm, faces ± canescent-scabrellous and gland-dotted. |
cauline; all or mostly opposite; petiolate or sessile; blades mostly ternately lobed (blades or lobes lanceolate to lance-linear), ultimate margins entire, faces sparsely to densely scabrellous (hairs white, straight, conic or fusiform, 0.1–0.4 mm) and gland-dotted. |
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Involucres | broadly turbinate to hemispheric, 5–6+ × 6–9+ mm. |
turbinate or obconic to ± hemispheric, 5–6+ mm diam. |
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Receptacles | ± convex, ± pitted, epaleate. |
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Ray florets | 3–5(–6); corollas pale yellow, laminae 3–5 mm. |
3–8, pistillate, fertile; corollas usually yellow, sometimes ochroleucous. |
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Disc florets | 30–60+; corollas 3.5–5 mm. |
20–40+, bisexual, fertile; corollas yellow to orange (gland-dotted), tubes about equaling funnelform to campanulate throats, lobes 5, deltate to lance-deltate. |
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Phyllaries | persistent, 6–10 in 1–2 series (reflexed in fruit, distinct, oblanceolate, subequal, herbaceous, margins membranous, not purplish). |
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Heads | radiate, borne singly or (3–6) in loose, corymbiform arrays. |
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Cypselae | 3–5 mm, usually gland-dotted, seldom hirsutulous; pappus scales usually ovate or elliptic to obovate, sometimes lanceolate, 0.5–1.5 mm. |
narrowly obpyramidal, 4-angled, finely nerved, shaggily hairy (at least at bases) and/or gland-dotted; pappi persistent, of 8–10 (distinct) ovate or elliptic to lanceolate or linear-subulate (basally and/or medially thickened, distally and/or laterally scarious) scales in 1 series (weakly, if at all, aristate). |
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x | = 12. |
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2n | = 48. |
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Picradeniopsis oppositifolia |
Picradeniopsis |
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Phenology | Flowering Jun–Oct. | |||||
Habitat | Roadsides, saline flats, shale sites | |||||
Elevation | 900–2500 m (3000–8200 ft) | |||||
Distribution |
AZ; CO; KS; MT; ND; NE; NM; OK; SD; TX; WY
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w United States; c United States |
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Discussion | Species 2 (2 in the flora). According to T. F. Stuessy et al. (1973), among others, Picradeniopsis is closely allied to Bahia. Indeed, the species are often treated as members of Bahia. Where they occur together, the two species of Picradeniopsis may produce more or less sterile hybrids. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 21, p. 385. | FNA vol. 21, p. 384. | ||||
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Picradeniopsis | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Trichophyllum oppositifolium, Bahia oppositifolia | |||||
Name authority | (Nuttall) Rydberg: in N. L. Britton, Man. Fl. N. States, 1008. (1901) | Rydberg ex Britton: Man. Fl. N. States, 1008. (1901) | ||||
Web links |