Micranthes integrifolia |
Micranthes tolmiei |
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Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage |
alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage |
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Habit | Pubescent perennial from a rhizome, the leafless flowering stems mostly single, 1-3 dm. tall. | Low, mat-forming perennial with numerous sterile, leafy branches, the flowering stems erect, 3-8 cm. tall, glabrous or pubescent with purplish-tipped hairs. |
Leaves | Leaves all basal, the blades 2-5 cm. long, narrowly rhombic to rhombic-ovate, narrowed gradually to broad petioles rarely as long, with prominent marginal hairs and rusty-woolly on the lower surface. |
Leaves glabrous, entire, fleshy and nearly terete, 3-10 mm. long, spatulate to oblanceolate, narrowed to a broad base; cauline leaves usually none, occasionally 1-3, reduced. |
Flowers | Inflorescence thyrsoid, (15-)20+-flowered, open to ± congested, conic (usually branched) subtended by a leafy, rusty-woolly bract; calyx broadly conic, the 5 lobes oblong-lanceolate, 1-2 mm. long, reflexed; petals 5, white, obovate, 1.5-3 mm. long, at least half as broad as long; stamens 10, short, awl-shaped. |
Flowers terminal and single, or 2-4 in a loose inflorescence; calyx saucer-shaped, glabrous, often purplish-tinged, the 5 oval, spreading lobes 2-3 mm. long; petals 5, white, up to twice as long as the calyx lobes, broadly oblanceolate, narrowed to the base; stamens 10, the filaments somewhat petaloid. |
Fruits | Ovary about inferior in fruit; mature follicles 2, 3.5-5 mm. long, often reddish or purplish. |
Ovary about 1/4 inferior at flowering; capsule ovoid, 8-12 mm. long, purplish-mottled; carpels sometimes 3 or more. |
Micranthes integrifolia |
Micranthes tolmiei |
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Flowering time | March-July | June-September |
Habitat | Prairies, grassy slopes and vernally moist areas, sea level to subalpine. | Mountain meadows, scree, and rock crevices at moderate to high elevations. |
Distribution | Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
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Occurring in the Olympic and Cascade mountains in Washington; Alaska south to California, east to Idaho, Montana, Nevada and Utah.
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Origin | Native | Native |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
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