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California lady slipper, California lady's-slipper

Habit Plants erect, 25–120 cm.
Leaves

5–10, along length of stem, alternate, ascending to spreading;

blade elliptic-lanceolate to broadly elliptic, 5–16 × 1.5–6.5 cm.

Flowers

3–18(–22);

sepals yellow-green to pale brownish yellow;

dorsal sepal elliptic, 14–20 × 7–13 mm;

lateral sepals connate almost to apex;

synsepal 12–20 × 10–12 mm;

petals spreading, same color as sepals or more yellowish, linear-oblong to linear-lanceolate, flat, 14–16 × 3–5 mm;

lip white, sometimes pinkish, obovoid, 15–20 mm;

orifice basal, 11–14 mm;

staminode suborbicular-subauriform.

Cypripedium californicum

Phenology Flowering May–Jun.
Habitat Forest openings, especially on steep slopes, in seeps, springy marshes
Elevation 0–1600 m [0–5200 ft]
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 26, p. 503.
Parent taxa Orchidaceae > subfam. Cypripedioideae > Cypripedium
Sibling taxa
C. acaule, C. arietinum, C. candidum, C. fasciculatum, C. guttatum, C. kentuckiense, C. montanum, C. parviflorum, C. passerinum, C. reginae, C. yatabeanum
Name authority A. Gray: Proc. Amer. Acad. Arts 7: 389. (1868)
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