Cypripedium fasciculatum
Melissa A. Carr

Flora of Oregon

Herbs to 20 cm tall.

Leaves opposite, 2, 5– 11 × 4–7.5 cm.

Inflorescences compressed with 2–5-clustered flowers, nodding.

Flowers dull yellow-green with purplish and/or brownish mottling throughout; dorsal sepal lanceolate to ovate, 1.5–2 × 0.3–0.9 cm; lateral sepals connate nearly to tip, similar in color and shape to dorsal sepal; petals lanceolate to ovate, 1.5–2 × 0.6–1.5 cm; lip 0.8–1.3 × 0.5–1 cm.

2n=20.

Mixed conifer forests. Flowering Apr–Jul. 50–1900m. BW, Casc, Sisk. CA, ID, WA; east to CO. Native.

The pedicel of this species elongates dramatically when in fruit, increasing the height of the plant from two to three times the flowering height.

Flora of North America

as described under Cypripedium fasciculatum

Plants erect, 6-35 cm in flower, taller in fruit; inflorescences nodding in flower, erect in fruit. Leaves 2, initially near middle of stem, subopposite, wide-spreading, distal portion elongating greatly in fruit; blade elliptic to ovate-orbiculate, 4-12 × 2.5-7.5 cm. Flowers (1-)2-4; sepals dull yellow, marked and suffused often intensely with reddish brown or dark purple; dorsal sepal lanceolate, 13-25 × 3-8 mm; lateral sepals connate, synsepal 11-23 × 4-9 mm; petals porrect-spreading, same color as sepals, flat, ovate-lanceolate to lance-acuminate, 10-23 × 6-17 mm; lip color of sepals, usually less intensely marked, mostly obovoid, 8-14(-25) mm, orifice basal, 4-5 mm; staminode ellipsoid to oblong. 2n = 20.Flowering Apr--Aug. Moist to dry coniferous forests and thickets; 0--3200 m; Calif., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.

Photo images

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Herbarium specimens

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https://botanydb.colorado.edu/botany/COLO_V/02048/02048072_tn.jpg
https://www.pnwherbaria.org/images/thumbnail.php?Image=SOC04194.jpg
https://www.pnwherbaria.org/images/thumbnail.php?Image=SOC10280.jpg