Micranthes rufidula |
Micranthes tempestiva |
|
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rusty-hair saxifrage |
storm saxifrage |
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Habit | Plants solitary or in groups, with bulbils on caudices, or rhizomatous. | Plants solitary or in groups, with bulbils on caudices. |
Leaves | basal; petiole flattened, 4–8 cm; blade ovate to elliptic, 1–4 cm, fleshy, base attenuate to ± truncate, margins serrate (15–30- toothed), eciliate, surfaces densely tangled, reddish brown-hairy abaxially, glabrous adaxially. |
basal; petiole indistinct (leaves appearing sessile), flattened, 2–8+ mm; blade oblanceolate to obovate, 4–10(–30) mm, fleshy, base cuneate to attenuate, margins entire or minutely denticulate, eciliate, (apex acute to obtuse or rounded), surfaces ± glabrous; (venation pinnate or palmate). |
Inflorescences | 15+-flowered, open, flat-topped thyrses, 5–20 cm, purple-tipped stipitate-glandular; (bracts often tangled brown-hairy). |
5–15(–20)-flowered, congested thyrses, 3–10(–15) cm, glabrous or sparsely purple-tipped stipitate-glandular. |
Flowers | sepals spreading, ovate, (often tangled brown-hairy); petals white, not spotted, ovate to elliptic, clawed, 2–4 mm, longer than sepals; filaments linear, flattened to slightly club-shaped; pistils distinct almost to base; ovary superior, (to 1/3 adnate to hypanthium). |
sepals spreading, ovate; petals white, not spotted, linear to obovate, clawed, to 1.5 mm, shorter than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary inferior. |
Capsules | greenish to reddish purple, folliclelike. |
reddish purple, valvate. |
2n | = 20, 38, 56, 58. |
= 10. |
Micranthes rufidula |
Micranthes tempestiva |
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Phenology | Flowering late winter–summer. | Flowering summer. |
Habitat | Wet to dry, rocky ledges | Rocky ledges, slopes, or snow-bed meadows |
Elevation | 0-3000 m (0-9800 ft) | 2400-3200 m (7900-10500 ft) |
Distribution |
CA; OR; WA; BC
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MT |
Discussion | Of conservation concern. Micranthes tempestiva is known only from the Bitterroot Mountains and Anaconda Range. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 8, p. 62. | FNA vol. 8, p. 69. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga aequidentata, Saxifraga occidentalis subsp. rufidula, Saxifraga occidentalis var. rufidula, Saxifraga rufidula | Saxifraga tempestiva |
Name authority | Small: in N. L. Britton et al., N. Amer. Fl. 22: 140. (1905) | (Elvander & Denton) Brouillet & Gornall: J. Bot. Res. Inst. Texas 1: 1021. 2007 , |
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