Micranthes integrifolia |
Micranthes nelsoniana |
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Columbian saxifrage, grassland saxifrage, northwestern saxifrage, smooth leaf saxifrage, swamp saxifrage, whole-leaf saxifrage |
dotted saxifrage, heartleaf saxifrage, Nelson's saxifrage, saxifrage |
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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 branched caudices, 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, 3–30 cm; blade reniform to round, 2–9 cm, thin or slightly fleshy, sometimes thick and fleshy, base cordate, margins deeply crenate, eciliate or sparsely short glandular-ciliate, surfaces glabrous or ± hairy. |
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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+-flowered, ± open, lax to congested, conic, sometimes also glomerate thyrses, 10–35 cm, tangled-hairy (pilose-arachnoid) at least distally, sometimes also purple- or brown-tipped stipitate-glandular. |
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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; petals white to pinkish, rarely orange-spotted, ovate to oblong, narrowly to broadly clawed, 2.5–4.5 mm, longer than sepals; filaments distinctly club-shaped; pistils connate 1/2–3/4 their lengths; ovary superior (to 1/3 adnate to hypanthium). |
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Capsules | reddish or purplish, folliclelike. |
green to yellow and purplish tinged to dark purple, valvate. |
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2n | = 38. |
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Micranthes integrifolia |
Micranthes nelsoniana |
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Phenology | Flowering late winter–spring. | |||||||||||||||||
Habitat | Vernally moist meadows, grassy slopes, rock outcrops | |||||||||||||||||
Elevation | 0-1800 m (0-5900 ft) | |||||||||||||||||
Distribution |
CA; OR; WA; BC
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AK; OR; WA; AB; BC; NT; NU; YT; Europe (ne Russia); Asia
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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.) |
Varieties 6 (5 in the flora). Although sometimes reported for North America, Saxifraga nelsoniana var. aestivalis (Fischer & C. A. Meyer) H. Ohba (S. aestivalis Fischer & C. A. Meyer) is found only in Eurasia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 8, p. 67. | FNA vol. 8, p. 54. | ||||||||||||||||
Parent taxa | Saxifragaceae > Micranthes | Saxifragaceae > Micranthes | ||||||||||||||||
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Subordinate taxa | ||||||||||||||||||
Synonyms | Saxifraga integrifolia | Saxifraga nelsoniana, Saxifraga punctata subsp. nelsoniana, Saxifraga punctata var. nelsoniana | ||||||||||||||||
Name authority | (Hooker) Small: in N. L. Britton et al., N. Amer. Fl. 22: 137. 1905 , | (D. Don) Small: in N. L. Britton et al., N. Amer. Fl. 22: 147. 1905 , | ||||||||||||||||
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