OregonFlora: Cypripedium montanum

	Cypripedium montanum
	mountain lady slipper
Habit	Herbs to 70 cm tall.
Leaves	alternate, 4–6, 8–17 × 4–10 cm.
Inflorescences	elongated, 1–3-flowered.
Flowers	dorsal sepal lanceolate to ovate, 3–6 × 1–1.5 cm, green suffused with purple; lateral sepals connate almost to tip, similar in color and shape to dorsal sepal; petals linearlanceolate and twisted, 4–7 × 0.3–0.6 cm, purple; lip 2–3 × 1.2–1.7 cm, white with purple spots inside.

	Cypripedium montanum
Distribution	[WildflowerSearch map] [BONAP county map]
Discussion	Mixed conifer forests, open shrubby woodlands, roadsides. Flowering Apr–Jul. 50–2200m. BW, Casc, Col, CR, ECas, Sisk, WV. CA, ID, WA; north to AK. Native.
Source	Flora of Oregon, volume 1, page 323 James Riser
Sibling taxa	C. californicum, C. fasciculatum
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Cypripedium montanum

mountain lady slipper

Habit

Herbs to 70 cm tall.

Leaves

alternate, 4–6, 8–17 × 4–10 cm.

Inflorescences

elongated, 1–3-flowered.

Flowers

dorsal sepal lanceolate to ovate, 3–6 × 1–1.5 cm, green suffused with purple;

lateral sepals connate almost to tip, similar in color and shape to dorsal sepal;

petals linearlanceolate and twisted, 4–7 × 0.3–0.6 cm, purple;

lip 2–3 × 1.2–1.7 cm, white with purple spots inside.

Cypripedium montanum

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Mixed conifer forests, open shrubby woodlands, roadsides. Flowering Apr–Jul. 50–2200m. BW, Casc, Col, CR, ECas, Sisk, WV. CA, ID, WA; north to AK. Native.

Source

Flora of Oregon, volume 1, page 323
James Riser

Sibling taxa

C. californicum, C. fasciculatum

Web links