Burke: Micranthes oregana vs. Micranthes rufidula

	Micranthes oregana	Micranthes rufidula
	bog saxifrage, Oregon saxifrage	rusty-hair saxifrage
Habit	Strong perennial from a short, woody base, the flowering stems leafless, 3-12 dm. tall, copiously glandular-pubescent above.	Herbaceous perennial from short, horizontal rhizomes, the 1-3 leafless, reddish-glandular stems 1-2.5 dm. tall.
Leaves	Leaves basal, 10-20 cm. long, contracted to a broadly-winged petiole, the blades elliptic-oblanceolate to ovate-lanceolate, entire or shallowly toothed, nearly glabrous, but with soft hairs on the petiole margins.	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 an elongate panicle, narrow to somewhat diffuse; calyx 2-3.5 mm. long, the 5 reflexed lobes oblong lanceolate; petals white to greenish-white, usually 5 but sometimes 1 or more lacking, often unequal in size, obovate to ovate-oblong, 2-4 mm. long and 1-2.5 broad; stamens 10, filaments broadly club-shaped, 1-2 mm. long, greenish-white to pinkish.	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 nearly superior in fruit; carpels 2-4.	Follicles reddish

	Micranthes oregana	Micranthes rufidula
Flowering time	April-July	February-August
Habitat	Bogs, streambanks and wet meadows at mid-elevations in the mountains.	Wet open areas, ledges, rock outcroppings from moderate to high elevations in the mountains.
Distribution	Both sides of the Cascades crest in Washington; Washington to California, east to Alberta, Montana, Idaho, Nevada, and Colorado. [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. lyallii, M. nelsoniana, M. nidifica, M. occidentalis, M. odontoloma, 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: 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 rufidula

bog saxifrage, Oregon saxifrage

rusty-hair saxifrage

Habit

Strong perennial from a short, woody base, the flowering stems leafless, 3-12 dm. tall, copiously glandular-pubescent above.

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

Leaves

Leaves basal, 10-20 cm. long, contracted to a broadly-winged petiole, the blades elliptic-oblanceolate to ovate-lanceolate, entire or shallowly toothed, nearly glabrous, but with soft hairs on the petiole margins.

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 an elongate panicle, narrow to somewhat diffuse;

calyx 2-3.5 mm. long, the 5 reflexed lobes oblong lanceolate;

petals white to greenish-white, usually 5 but sometimes 1 or more lacking, often unequal in size, obovate to ovate-oblong, 2-4 mm. long and 1-2.5 broad;

stamens 10, filaments broadly club-shaped, 1-2 mm. long, greenish-white to pinkish.

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 nearly superior in fruit;

carpels 2-4.

Follicles reddish