Burke: Micranthes oregana vs. Micranthes nidifica

	Micranthes oregana	Micranthes nidifica
	bog saxifrage, Oregon saxifrage	Columbia saxifrage, swamp saxifrage
Habit	Strong perennial from a short, woody base, the flowering stems leafless, 3-12 dm. tall, copiously glandular-pubescent above.
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.
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.
Fruits	Ovary nearly superior in fruit; carpels 2-4.

	Micranthes oregana	Micranthes nidifica
Flowering time	April-July	April-July
Habitat	Bogs, streambanks and wet meadows at mid-elevations in the mountains.	Prairies and wet banks to subalpine meadows.
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 east of the Cascades crest in Washington; British Columbia to California, east to Montana and Wyoming. [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. occidentalis, M. odontoloma, M. oregana, M. rufidula, 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, 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

Micranthes nidifica

bog saxifrage, Oregon saxifrage

Columbia saxifrage, swamp saxifrage

Habit

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

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.

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.

Fruits

Ovary nearly superior in fruit;

carpels 2-4.