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Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage

alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage

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

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.
[WildflowerSearch map]
[BONAP county map]
Occurring in the Olympic and Cascade mountains in Washington; Alaska south to California, east to Idaho, Montana, Nevada and Utah.
[WildflowerSearch map]
[BONAP county map]
Origin Native Native
Conservation status Not of concern Not of concern
Sibling taxa
M. apetala, M. ferruginea, M. fragosa, M. gormanii, M. idahoensis, M. lyallii, M. nelsoniana, M. nidifica, M. occidentalis, M. odontoloma, M. oregana, M. rufidula, M. tischii, M. tolmiei
M. apetala, M. ferruginea, M. fragosa, M. gormanii, M. idahoensis, M. integrifolia, M. lyallii, M. nelsoniana, M. nidifica, M. occidentalis, M. odontoloma, M. oregana, M. rufidula, M. tischii
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