Allium acuminatum, tapertip onion

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Intermountain Flora
Bulb oviod to subglobose, the outer coat cellular-reticulate, the meshes square or polygonal with thick, obscurely sinuous walls; leaves 2-4, narrow, concave-convex, channeled, shorter than the scape; scape terete, mostly 10-35 cm tall; bracts 2, lanceolate to ovate, acuminate, 1-3 cm long; pedicels spreading, ¾-2 times as long as the perianth; tepals serrulate-denticulate (the inner ones the more prominently so), white to more often pink or rose-purple, lanceolate to lance-ovate, acuminate, erect, becoming rigid and keeled in fruit, with somewhat involute margins, the outer 8-13 (16) mm long, with recurved or spreading tip, the inner shorter and narrower, with strongly recurved tip; stamens shorter than the tepals; ovary inconspiculously crested, with 3 minute, bilobed apical processes; stigma capitate, obscurely 3-lobed; seeds with minutely roughened alveolie; n = 7.

Cronquist, A., Holmgren, A.H., Holmgren, N.H., Reveal, J.L., and Holmgren, P.K. (1977) "Intermountain Flora" pg. 517-518, vol. 6, The New York Botanical Garden New York.