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Compilation
Allium cernuum

17 Images see all

Allium cernuum Roth [family LILIACEAE (AMARYLLIDACEAE)]
Filed as Allium cernuum [family LILIACEAE]
Filed as Allium cernuum Roth [family ALLIACEAE]
Filed as Allium indet. [family AMARYLLIDACEAE]
Filed as Allium cernuum Roth [family ALLIACEAE]
Allium cernuum Roth [family LILIACEAE (AMARYLLIDACEAE)]
Allium cernuum Roth [family LILIACEAE (AMARYLLIDACEAE)]
Filed as Allium cernuum Roth [family ALLIACEAE]
Filed as Allium cernuum [family LILIACEAE]
Allium cernuum (L.) Roth [family AMARYLLIDACEAE]
Filed as Allium cernuum Roth [family ALLIACEAE]
Type of Allium cernuum Roth [family ALLIACEAE]
Paratype? of Allium recurvatum Rydb. [family ALLIACEAE]
Paratype of Allium recurvatum Rydb. [family ALLIACEAE]
Filed as Allium cernuum [family LILIACEAE]
Allium cernuum Roth [family LILIACEAE (AMARYLLIDACEAE)]
Filed as Allium cernuum Roth [family ALLIACEAE]
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Name

Identification
Allium cernuum Roth [family ALLIACEAE ] (stored under name); Verified by Roth, A.W.,
Related name
  • Allium ornithogaloides
  • Allium cernuum
  • Allium sp.
  • Allium indet.

Flora

Entry for Allium cernuum Roth [family ALLIACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 26,
Names
Allium cernuum Roth [family ALLIACEAE], Arch. Bot. (Leipzig), 1: 40. 1798
Allium allegheniense Small [family ALLIACEAE]
Allium oxyphilum Wherry [family ALLIACEAE]
Allium recurvatum Rydberg [family ALLIACEAE]
Treatment Author(s)
Dale W. McNeal Jr.
T. D. Jacobsen
Information
Bulbs 2–5+, clustered, often short-rhizomatous at base, rhizome not stout or iris-like, oblong, elongate, 1–3 × 0.8–1.5 cm; outer coats enclosing 1 or more bulbs, grayish or brownish, membranous, minutely striate, cells in regular vertical rows, narrowly elongate, fibers persistent, parallel, few; inner coats white to pink or reddish, cells in regular vertical rows, narrowly elongate. Leaves persistent, green at anthesis, 3–5, basally sheathing, sheaths not extending much above soil level; blade solid, flat, channeled to broadly V-shaped in cross section, 10–25 cm × 1–6 mm, margins entire or denticulate. Scape persistent, sometimes 2 or more produced successively from single bulb, usually clustered, nodding, solid, terete or ridged, particularly distally, sometimes flattened and narrowly winged, abruptly recurved near apex, 10–50 cm × 1–3 mm. Umbel persistent, cernuous, loose, 8–35-flowered, hemispheric, bulbils unknown; spathe bracts persistent, 2, 3-veined, lanceolate, ± equal, apex acuminate, beakless. Flowers campanulate, 4–6 mm; tepals ± erect, pink or white, elliptic-ovate, ± equal, withering in fruit, margins ± entire, apex ± obtuse, at least outer tepals strongly incurved, midribs not thickened; stamens exserted; anthers yellow; pollen yellow; ovary conspicuously crested; processes 6, flattened, ± triangular, margins entire or toothed; style exserted, linear, ± equaling stamens; stigma capitate, scarcely thickened, unlobed; pedicel 6–25 mm, becoming stouter in fruit, elongating and bending abruptly upward from near point of attachment. Seed coat dull or shining; cells smooth, minutely roughened, or each with minute, central papilla. 2n = 14.
Phenology
jul-aug (summer), sep-oct (fall)
Altitude range
600–3500 m;
Distribution
Mexico.USA Ala.USA Ariz.USA Ark.USA Colo.USA D.C.USA Ga.USA IdahoUSA Ill.USA Ind.USA IowaUSA Ky.USA Md.USA Mich.USA Minn.USA Mo.USA Mont.USA Nebr.USA N.Mex.USA N.Y.USA N.C.USA OhioUSA Oreg.USA Pa.USA S.C.USA S.Dak.USA Tenn.USA Tex.USA UtahUSA Va.USA Wash.USA W.Va.USA Wis.USA Wyo.Canada Alta.Canada B.C.Canada Ont.Canada Sask.
Discussion
Allium cernuum is the most widespread North American species of the genus. It is closely related to A. stellatum, and the character commonly used to differentiate them has been umbel orientation. In both species, the inflorescence is nodding in bud, but in A. stellatum it usually becomes erect by anthesis. In A. cernuum the peduncle remains permanently recurved near the apex, although the inflorescence may sometimes become erect overall, or nearly so. While this character is helpful in identification, an almost exclusive reliance on it (even by one of the present authors in his youth) has obscured other clearer distinctions between the species and has confused their geographic ranges. More reliable characters for differentiating these species are bulb shape (elongate in A. cernuum, ovoid in A. stellatum) and perianth shape (campanulate in A. cernuum, stellate in A. stellatum). Unfortunately, perianth shape is often difficult to see in herbarium specimens.

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