Burke: Micranthes oregana vs. Micranthes integrifolia

	Micranthes oregana	Micranthes integrifolia
	bog saxifrage, Oregon saxifrage	Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage
Habit	Strong perennial from a short, woody base, the flowering stems leafless, 3-12 dm. tall, copiously glandular-pubescent above.	Pubescent perennial from a rhizome, the leafless flowering stems mostly single, 1-3 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 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.
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 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.
Fruits	Ovary nearly superior in fruit; carpels 2-4.	Ovary about inferior in fruit; mature follicles 2, 3.5-5 mm. long, often reddish or purplish.

	Micranthes oregana	Micranthes integrifolia
Flowering time	April-July	March-July
Habitat	Bogs, streambanks and wet meadows at mid-elevations in the mountains.	Prairies, grassy slopes and vernally moist areas, sea level to subalpine.
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 west of the Cascades crest and east in the Columbia River Gorge 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. lyallii, M. nelsoniana, M. nidifica, 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 integrifolia

bog saxifrage, Oregon saxifrage

Columbian saxifrage, swamp saxifrage, whole-leaf saxifrage

Habit

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

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

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 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.

Fruits

Ovary nearly superior in fruit;

carpels 2-4.

Ovary about inferior in fruit; mature follicles 2, 3.5-5 mm. long, often reddish or purplish.