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Micranthes lyallii

Lyall's saxifrage, red-stemmed saxifrage

rusty-hair saxifrage

Habit Perennial with well-developed rhizomes, often forming small mats. Herbaceous perennial from short, horizontal rhizomes, the 1-3 leafless, reddish-glandular stems 1-2.5 dm. tall.
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 basal, the blades ovate, up to 6 cm. long and 3 cm. wide, with 15-30 rounded teeth, reddish-woolly on the lower surface;

petioles slender, shorter or somewhat longer than the blades.

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.

Inflorescence an open, flat-topped panicle, the bracts reddish-woolly;

calyx reddish-woolly, divided about half its length, the 5 ovate lobes 1-2.5 mm. long;

petals 5, white, 2-3.5 mm. long, broadly ovate, narrowed abruptly to the base;

stamens 10, the filaments awl-shaped, reddish;

ovary about 1/3 inferior.

Fruits

Follicle 7-12 mm. long exclusive of the slender, divergent, stylar beaks.

Follicles reddish

Micranthes lyallii

Micranthes rufidula

Flowering time July-September February-August
Habitat Wet, gravelly meadows and along streams and ponds at high elevations. Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.
Distribution
Occurring on both sides of the Cascades crest in northern Washington; Alaska to Washington, east to Alberta, Idaho, and Montana.
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; British Columbia to California.
[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. integrifolia, 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. tischii, M. tolmiei
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