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Family: Liliaceae
claspleaf twistedstalk, more...claspleaf twistedstalk, tubercle twistedstalk [ Streptopus amplexifolius subsp. americanus (Schult. & Schult.f.) Á.Löve & D.Löve, moreStreptopus amplexifolius subsp. papillatus (Ohwi) Á. Löve & D. Löve, Streptopus amplexifolius var. americanus Schult. & Schult.f., Streptopus amplexifolius var. chalazatus Fassett, Streptopus amplexifolius var. denticulatus Fassett, Streptopus amplexifolius var. grandiflorus Fassett, Streptopus amplexifolius var. oreopolus Fassett, Streptopus amplexifolius var. papillatus Ohwi, Tortipes amplexifolius (L.) Small, Uvularia amplexifolia L.] |
Plants from thick rhizomes. Stems freely branched, stout, 5-12 dm, often with reddish hairs basally, nodes not fringed. Leaves 5-15 × 2.5-6 cm; blade ovate-oblong to oblong-lanceolate, base cordate-clasping, apex acuminate; peduncle: junction with pedicel abrupt, with glands indicating transition, entire structure 2-5 cm, glands short-stalked. Flowers 1-2 per axil; perianth campanulate; tepals spreading, recurved at tips, white to greenish yellow, narrowly oblong-lanceolate, 9-15 mm; stamens unequal, outer shorter, 0.8-1 mm, inner 2-3 mm; anthers lanceolate, 3-3.5 mm, apex 1-pointed; style stout, 4-5 mm; stigma fused from base to tip, unlobed; combined peduncles and pedicels recurved, 2-5 cm, short-stalked glands indicating transition; pedicel sharply geniculate, glabrous. Berries whitish green maturing to yellowish orange or red, ellipsoid, 10-12 mm. Seeds 2.5-3 mm. 2n = 16, 32. Flowering late spring--mid summer. Rich moist coniferous and deciduous woods; 0--2800 m; Greenland; St. Pierre and Miquelon; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S, Ont., P.E.I., Que., Sask., Yukon; Alaska, Ariz., Calif., Colo., Conn., Idaho, Maine, Mass., Mich., Minn., Mont., N.H., N.Mex., N.Y., N.C., Oreg., Pa., S.Dak., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Eurasia. Several poorly defined races described by N. C. Fassett (1935) as varieties based chiefly on minute difference in leaf-margin serration are not here recognized. Stem 4-10 dm, glabrous except near the base; lvs ovate-oblong or lance-ovate, acuminate, cordate-clasping, entire or very minutely toothed, the main ones 6-12 נ2-5.5 cm; free part of the peduncle and pedicel together 3-5 cm, jointed at about two-thirds of its length, above the joint
1-fld (or sometimes 2-fld) and abruptly deflexed or twisted; tep greenish-white, 1 cm, spreading from near the middle; anthers 1-pointed, those of the outer series much longer than the filaments; stigma entire or barely 3- lobed; fr red, mostly ellipsoid, 1.5 cm; 2n=32. Rich moist woods; circumboreal, in Amer. s. to Mass., N.Y., Mich., Wis., and Minn., and in the mts. to N.C. and Ariz. Our plants are var. americanus J. A. Schult.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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