Micranthes lyallii |
Micranthes tolmiei |
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Lyall's saxifrage, red-stemmed saxifrage |
alpine saxifrage, Tolmie's alpine saxifrage, Tolmie's saxifrage |
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Habit | Perennial with well-developed rhizomes, often forming small mats. | 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 leaves wedge-shaped to fan-shaped, 10-25 mm. long and nearly as broad, coarsely dentate with 7-9 teeth, with slender petioles of similar length, glabrous or with a few soft, brown hairs. |
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, calyx and fruits often bright red; inflorescence a cyme with up to 15 flowers, the peduncles slender, often with linear, entire bracts; calyx lobed almost to the base, the 5 lobes oblong-lanceolate, 2-3 mm. long, sharply reflexed; petals 5, white, aging to pink, 2.5-4 mm. long, the blade oblong-oval, rounded to a short, broad claw; stamens 10, equaling the petals, the filaments white, club-shaped; carpels often 3-5, fused only 0.5-1 mm., the ovary mostly superior, the carpels tapered to styles less than 1 mm. long. |
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 | Follicle 7-12 mm. long exclusive of the slender, divergent, stylar beaks. |
Ovary about 1/4 inferior at flowering; capsule ovoid, 8-12 mm. long, purplish-mottled; carpels sometimes 3 or more. |
Micranthes lyallii |
Micranthes tolmiei |
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Flowering time | July-September | June-September |
Habitat | Wet, gravelly meadows and along streams and ponds at high elevations. | Mountain meadows, scree, and rock crevices at moderate to high elevations. |
Distribution | Occurring on both sides of the Cascades crest in northern Washington; Alaska to Washington, east to Alberta, Idaho, and Montana.
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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 | ||
Web links |
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