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Gleason & Cronquist
John W. Thieret, Richard K. Rabeler in Flora of North America (vol. 5)
simple proximally, branched distally, terete.
opposite, somewhat clasping or connate proximally into sheath, petiolate (basal) or sessile (cauline); blade 1-veined, lanceolate to oblong- or ovate-lanceolate, apex acute to obtuse.
terminal, lax to erect, open, often flat-topped cymes; bracts paired, foliaceous; involucel bracteoles absent.
sepals connate proximally into tube, 9-17 cm, tube whitish green, 5-veined, cylindric to ovoid, 5-angled or winged, especially in fruit, commissures between sepals absent; lobes green, 1-veined, obovate to broadly triangular, shorter than tube, margins green or reddish, scarious, apex acute or acuminate; petals 5, pink to purplish, clawed, auricles absent, coronal appendages absent, blade apex entire or sometimes briefly 2-fid; nectaries at filament bases; stamens 10, adnate to petals; filaments distinct; staminodes absent; ovary 1-locular or sometimes 2-locular proximally; styles 2(-3), filiform, 10-12 mm, glabrous proximally; stigmas 2(-3), linear along adaxial surface of styles, papillate (30×).
oblong to subglobose, exocarp opening by 4(-6) slightly spreading teeth, endocarp opening irregularly; carpophore present.
ca. 10, black, subglobose, laterally compressed, papillose, marginal wing absent, appendage absent; embryo peripheral, curved.
Vascular plants of NE US and adjacent Canada
Infl a loose, open, paniculate cyme; cal strongly 5- ribbed, sharply wing-angled; pet pink or rose, without auricles or appendages; stamens 10; styles 2(3); capsule firm, dehiscent by 4(6) ascending teeth; seeds large, globose; much branched annuals. 4, mainly temp. Eurasia.
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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Species within checklist:
Blacktail Deer Creek NEON (BLDE) plants - Northern Rockies (D12)