Clasp-leaf Twisted-stalk, Claspingleaf Twistedstalk, Clasping-leaf Twisted Stalk, Clasping Twisted-stalk, Cucumber Root: Streptopus amplexifolius (Synonyms: Streptopus amplexifolius var. americanus, Streptopus amplexifolius var. amplexifolius, Streptopus amplexifolius var. chalazatus) - Tips of tepals strongly curved outwards from about mid-tepal. Tepals creamy white or greenish white. Leaf bases strongly clasping. Flower peduncles sharply angled downward at their middle. Plants 50-120 cm high.
Rosy Twisted Stalk: Streptopus lanceolatus (Synonyms: Streptopus curvipes, Streptopus lanceolatus var. curvipes, Streptopus roseus, Streptopus roseus var. curvipes) - Tips of tepals only curved outwards at the tip. Tepals rose-colored or reddish purple in color with whitish tips, or cream to greenish white with numerous reddish purple streaks or spots. Leaf bases sessile to slightly clasping. Flower peduncles glandular and gradually curved downwards. Plants 10-30 cm high.