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clasping twisted-stalk, claspleaf twisted-stalk

Habit Plants 50–120 cm tall; stems branched, glabrous or pubescent basally.
Leaves

5–12(15) × 2–5 cm, clasping;

margins without hairs.

Flowers

bell-shaped;

tepals narrowly oblong-lanceolate, 9–15 mm, white to greenish yellow;

inner tepals clasping stamens;

tips spreading to somewhat recurved;

pedicels twisted;

stamens unequal; inner series 2–3 mm; outer series approximately 1 mm;

anthers 3–4 mm;

style 4–5 mm;

stigma unlobed or minutely 3-lobed.

Fruits

ellipsoid, 5–9 mm; whitish green when young, maturing to orange or red.

Seeds

approximately 3 mm long.

2n

=16, 32.

Streptopus amplexifolius

Distribution
[WildflowerSearch map]
[BONAP county map]
Discussion

Moist forests, shady stream banks. Flowering May–Jul. 0–2600m. BW, Casc, CR, ECas, Est, Sisk, WV. CA, ID, WA; northwestern and northeastern North America, Rocky Mountains; Eurasia. Native.

Hybrids between S. amplexifolius and S. lanceolatus have been encountered where their ranges overlap in eastern North America. Thus far, hybrids have not been documented in western North America.

Source Flora of Oregon, volume 1, page 310
Stephen Meyers
Sibling taxa
S. lanceolatus, S. streptopoides
Synonyms Streptopus amplexifolius var. americanus, Streptopus amplexifolius var. chalazatus
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