Page authors: Don Knoke, David Giblin
Streptopus amplexifolius
cucumber root, clasp-leaf twisted-stalk, clasping twisted-stalk

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, also in northeastern North America.

Habitat: Open to dense moist forests from low elevations to subalpine.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Perennial herbs from extensive rhizomes, the freely-branched stems 5-10 dm. tall, glabrous throughout or pubescent on the lower third.


Leaves cauline, ovate to oblong-lanceolate, 5-12 cm. long, with clasping bases and acuminate tips.


Flowers usually single, bell-shaped, borne beneath the leaves, the pedicle attached to the slender, glabrous peduncle at a sharp angle; tepals 6, distinct, white with a greenish tinge, 9-15 mm. long, oblong-lanceolate, the tips recurved, the inner series clasping the stamens; stamens 6, unequal, the filaments of the outer series much shorter than those of the inner series; style 1, thick 4-5 mm. long.


Fruit a globose berry, yellow to red, about 1 cm. long.

Accepted Name:
Streptopus amplexifolius (L.) DC.
Publication: Fl. Franç. ed. 3. 3: 174. 1805.

Synonyms & Misapplications:
Streptopus amplexifolius (L.) DC. ssp. americanus (Schult. & Schult. f.) Á. Löve & D. Löve
Streptopus amplexifolius (L.) DC. var. americanus Schult. & Schult. f. [HC]
Streptopus amplexifolius (L.) DC. var. amplexifolius [KZ99]
Streptopus amplexifolius (L.) DC. var. chalazatus Fassett [HC]
Streptopus amplexifolius (L.) DC. var. denticulatus Fassett
Streptopus amplexifolius (L.) DC. var. grandiflorus Fassett
Streptopus fassettii Á. Löve & D. Löve
Tortipes amplexifolius (L.) Small
Uvularia amplexifolia L.
Additional Resources:

PNW Herbaria: Specimen records of Streptopus amplexifolius in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Streptopus amplexifolius checklist entry.

OregonFlora: Streptopus amplexifolius information.

E-Flora BC: Streptopus amplexifolius atlas page.

CalPhotos: Streptopus amplexifolius photos.

USDA Plants: Streptopus amplexifolius information.

67 photographs:
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