Micranthes integrifolia |
Micranthes foliolosa |
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Columbian saxifrage, grassland saxifrage, northwestern saxifrage, smooth leaf saxifrage, swamp saxifrage, whole-leaf saxifrage |
leafy stem saxifrage, naked-bulbil small-flower-saxifrage, saxifrage à bulbilles |
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Habit | Plants solitary or in clumps, (sometimes gynodioecious), often with bulbils on caudices, or short-rhizomatous. | Plants solitary or tufted, with bulbils on caudices. |
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 ± absent; blade oblanceolate, 6–15(–30) cm, ± fleshy, base cuneate, margins subentire, sometimes 1–3-toothed distally, eciliate or sparsely ciliate, surfaces glabrate. |
Inflorescences | (15–)20+-flowered, open to ± congested, conic thyrses, (usually branched, lateral cymules ± open), 12–35 cm, densely pink- to purple-tipped stipitate-glandular. |
2(–5+)-flowered, (proximal flowers replaced by bulbils), narrow, branched, sometimes ± open, cylindric thyrses, sometimes solitary flowers, 5–15 cm, glabrous or sparsely purple-tipped stipitate-glandular. (Pedicels erect to ascending.) Flowers: sepals reflexed, lanceolate; petals white, each with 1–2 basal yellow spots, lanceolate, clawed, 3–8 mm, longer than sepals; filaments linear, flattened; pistils connate 1/2+ their lengths; ovary superior, (to 1/3 adnate to hypanthium). |
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. |
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Capsules | reddish or purplish, folliclelike. |
green to purplish, valvate. |
2n | = 38. |
= 56. |
Micranthes integrifolia |
Micranthes foliolosa |
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Phenology | Flowering late winter–spring. | Flowering late summer. |
Habitat | Vernally moist meadows, grassy slopes, rock outcrops | Mossy tundra near streams and flushes, wet, rocky slopes, snowbeds |
Elevation | 0-1800 m (0-5900 ft) | 0-1800 m (0-5900 ft) |
Distribution |
CA; OR; WA; BC
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AK; CO; ME; NL; NT; NU; QC; YT; Greenland; n Europe; n Asia |
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. 57. |
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes |
Sibling taxa | ||
Synonyms | Saxifraga integrifolia | Saxifraga foliolosa, Saxifraga foliolosa var. multiflora, Saxifraga stellaris subsp. comosa, Saxifraga stellaris var. comosa |
Name authority | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 137. 1905 , | (R. Brown) Gornall: J. Bot. Res. Inst. Texas 1: 1020. 2007 , |
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