Micranthes integrifolia |
Micranthes odontoloma |
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Columbian saxifrage, grassland saxifrage, northwestern saxifrage, smooth leaf saxifrage, swamp saxifrage, whole-leaf saxifrage |
brook saxifrage, stream saxifrage, streambank saxifrage |
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Habit | Plants solitary or in clumps, (sometimes gynodioecious), often with bulbils on caudices, or short-rhizomatous. | Plants solitary or sometimes grouped, rhizomatous. |
Leaves | 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. |
basal; petiole rounded, 2–30 cm; blade round, 7–40 cm, thin to slightly fleshy, base cordate to truncate, margins regularly dentate, eciliate, surfaces sparsely brownish hairy abaxially, glabrous adaxially. |
Inflorescences | (15–)20+-flowered, open to ± congested, conic thyrses, (usually branched, lateral cymules ± open), 12–35 cm, densely pink- to purple-tipped stipitate-glandular. |
10–30+-flowered, open, lax, flat-topped thyrses, 20–65(–85) cm, glabrous proximally, purple-tipped subsessile-glandular distally. |
Flowers | 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. |
sepals reflexed, ovate to elliptic; petals white, each with 2 basal yellow spots, round to broadly elliptic, clawed, 3–4.5 mm, longer than sepals; filaments strongly club-shaped, (to 6 mm); pistils connate ca. 1/2 their lengths; ovary superior. |
Capsules | reddish or purplish, folliclelike. |
green to purple, ± folliclelike. |
2n | = 38. |
= 24, 48. |
Micranthes integrifolia |
Micranthes odontoloma |
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Phenology | Flowering late winter–spring. | Flowering summer–early autumn. |
Habitat | Vernally moist meadows, grassy slopes, rock outcrops | Wet meadows and stream banks |
Elevation | 0-1800 m [0-5900 ft] | 1500-4000 m [4900-13100 ft] |
Distribution |
CA; OR; WA; BC
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AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
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Discussion | 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.) |
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Source | FNA vol. 8, p. 67. | FNA vol. 8, p. 56. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Saxifraga integrifolia | Saxifraga odontoloma |
Name authority | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 137. 1905 , | (Piper) A. Heller: Muhlenbergia 8: 60. 1912 , |
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