Mentzelia multicaulis |
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manystem blazingstar, multiple-branch blazingstar |
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Habit | Plants perennial, bushlike, with subterranean caudices or sometimes rhizomes. |
Stems | multiple, erect or decumbent, zigzag or straight; branches distal or along entire stem, distal longest or all ± equal, antrorse, straight to upcurved; hairy. |
Leaves | blade 20–49(–57) × 4.2–19 mm, widest intersinus distance 1.1–5.3 mm; proximal oblanceolate to elliptic, margins pinnate to pinnatisect, lobes 4–10, slightly antrorse, 0.7–7.6 mm; distal linear to lanceolate, base not clasping, margins entire or pinnate, lobes 0–10, slightly antrorse, 1.9–7.8 mm; abaxial surface with simple grappling-hook trichomes, adaxial surface with grappling-hook and needlelike trichomes. |
Bracts | margins entire. |
Flowers | petals golden yellow, 10.6–17.9 × 5.1–9 mm, apex obtuse, glabrous abaxially; stamens golden yellow, 5 outermost petaloid, filaments oblanceolate, slightly clawed, 6.5–10.5 × 2–4.5 mm, with anthers, second whorl with anthers; anthers twisted or straight after dehiscence, epidermis smooth; styles 6–11.5 mm. |
Capsules | cup-shaped to cylindric, 6–13.6 × 3.4–6 mm, base tapering to rounded, not longitudinally ridged. |
Seeds | coat anticlinal cell walls straight, papillae 4–9 per cell. |
2n | = 22. |
Mentzelia multicaulis |
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Phenology | Flowering Jun–Aug. |
Habitat | Sparsely vegetated steep slopes, drainage gullies, roadcuts. |
Elevation | 2000–2500 m. (6600–8200 ft.) |
Distribution |
CO
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Discussion | Mentzelia multicaulis is known to occur in Eagle, Grand, and Summit counties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 511. |
Parent taxa | Loasaceae > Mentzelia > sect. Bartonia |
Sibling taxa | |
Synonyms | Touterea multicaulis |
Name authority | (Osterhout) J. Darlington: Ann. Missouri Bot. Gard. 21: 156. (1934) |
Web links |