Burke: Micranthes oregana vs. Micranthes occidentalis

	Micranthes oregana	Micranthes occidentalis
	bog saxifrage, Oregon saxifrage	mountain saxifrage, redwool saxifrage, western 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, pubescent 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 elliptic, up to 6 cm. long and 3 cm. wide, with 15-30 rounded teeth; petioles slightly winged, 1-3 times as long as 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 pyramidal, somewhat compact, up to 10 cm. long, the branches ascending; calyx divided about half its length, the 5 ovate lobes 1-2.5 mm. long; petals 5, white, broadly elliptic, 1.5-3 mm. long; stamens 10, the filaments club-shaped; ovary less than 1/3 inferior
Fruits	Ovary nearly superior in fruit; carpels 2-4.	Follicles greenish

	Micranthes oregana	Micranthes occidentalis
Flowering time	April-July	May-August
Habitat	Bogs, streambanks and wet meadows at mid-elevations in the mountains.	Dry to wet open areas, rock crevices, meadows, and streambanks 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]	Both sides of the Cascades in Washington; Alaska south to Oregon and Nevada, east to Saskatachewan and south to New Mexico. [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. 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, OR, WA Local Web sites: 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 occidentalis

bog saxifrage, Oregon saxifrage

mountain saxifrage, redwool saxifrage, western 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, pubescent 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 elliptic, up to 6 cm. long and 3 cm. wide, with 15-30 rounded teeth;

petioles slightly winged, 1-3 times as long as 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 pyramidal, somewhat compact, up to 10 cm. long, the branches ascending;

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

petals 5, white, broadly elliptic, 1.5-3 mm. long;

stamens 10, the filaments club-shaped;

ovary less than 1/3 inferior

Fruits

Ovary nearly superior in fruit;

carpels 2-4.

Follicles greenish