Burke: Micranthes integrifolia vs. Micranthes rufidula

	Micranthes integrifolia	Micranthes rufidula
	Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage	rusty-hair saxifrage
Habit	Pubescent perennial from a rhizome, the leafless flowering stems mostly single, 1-3 dm. tall.	Herbaceous perennial from short, horizontal rhizomes, the 1-3 leafless, reddish-glandular stems 1-2.5 dm. tall.
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 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 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.	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	Ovary about inferior in fruit; mature follicles 2, 3.5-5 mm. long, often reddish or purplish.	Follicles reddish

	Micranthes integrifolia	Micranthes rufidula
Flowering time	March-July	February-August
Habitat	Prairies, grassy slopes and vernally moist areas, sea level to subalpine.	Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.
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 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. 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. tischii, M. tolmiei
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Micranthes integrifolia

Micranthes rufidula

Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage

rusty-hair saxifrage

Habit

Pubescent perennial from a rhizome, the leafless flowering stems mostly single, 1-3 dm. tall.

Herbaceous perennial from short, horizontal rhizomes, the 1-3 leafless, reddish-glandular stems 1-2.5 dm. tall.

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 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 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.

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.