Micranthes aprica |
Micranthes integrifolia |
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Sierra saxifrage |
Columbian saxifrage, grassland saxifrage, northwestern saxifrage, smooth leaf saxifrage, swamp saxifrage, whole-leaf saxifrage |
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Habit | Plants solitary, in clumps, or sometimes mat-forming, with bulbils on caudices, or rhizomatous. | Plants solitary or in clumps, (sometimes gynodioecious), often with bulbils on caudices, or short-rhizomatous. |
Leaves | basal; petiole flattened, 0.5–2 cm; blade obovate to elliptic, 1.5–4 cm, fleshy, base attenuate, margins entire or apically denticulate, eciliate, surfaces glabrous or sparsely hairy. |
basal; petiole flattened, 0.5–4 cm; blade narrowly to broadly ovate, 2–7 cm, ± leathery, base attenuate, margins entire or minutely denticulate, usually ciliate, surfaces sparsely to moderately hairy. |
Inflorescences | 5+-flowered, densely crowded in 1–3 glomerulate, often flat-topped thyrses, 3.5–15(–20) cm, sparsely purple-tipped stipitate-glandular. |
(15–)20+-flowered, open to ± congested, conic thyrses, (usually branched, lateral cymules ± open), 12–35 cm, densely pink- to purple-tipped stipitate-glandular. |
Flowers | sepals ascending to spreading, ovate; petals white, not spotted, elliptic to linear, clawed, 1.8–3 mm, slightly longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary inferior, appearing more superior in fruit. |
sepals spreading to slightly reflexed, ovate; petals white, not spotted, obovate, clawed, 2–4 mm, longer than sepals; filaments linear, flattened; pistils connate to 1/2 their lengths; ovary 1/2+ inferior. |
Capsules | purple, folliclelike. |
reddish or purplish, folliclelike. |
2n | = 20. |
= 38. |
Micranthes aprica |
Micranthes integrifolia |
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Phenology | Flowering summer. | Flowering late winter–spring. |
Habitat | Rocky alpine and snowbed meadows | Vernally moist meadows, grassy slopes, rock outcrops |
Elevation | 1700-4500 m (5600-14800 ft) | 0-1800 m (0-5900 ft) |
Distribution |
CA; NV; OR
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CA; OR; WA; BC
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Discussion | Specimens of Micranthes aprica from the Klamath region of California and Oregon are unusually robust, occur at unusually low elevations, and have usually pollen-sterile flowers (P. E. Elvander 1984). In the Steens Mountains of southwestern Oregon, specimens that are morphologically similar to M. rhomboidea from some Utah locations can be found. Although tentatively relegated to M. aprica, these populations need thorough study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The occasional occurrence of sterile pollen has been noted in this as well as in other species of Micranthes (as Saxifraga, K. I. Beamish 1961). Some populations exhibit gynodioecism (P. E. Elvander 1982). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 8, p. 69. | FNA vol. 8, p. 67. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga aprica | Saxifraga integrifolia |
Name authority | (Greene) Small: in N. L. Britton et al., N. Amer. Fl. 22: 135. (1905) | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 137. 1905 , |
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