Torrey, Ann. Lyceum Nat. Hist. New York. 2: 205. 1827.
perennial, tufted, glabrous.
rootstocks, decumbent and ascending, branched, (sometimes papillose), bearing terminal rosettes and above ground shoots.
(not easily detached), alternate, spreading-erect to erect or ascending, sessile; blade dull gray-green or bluish green, green, or reddish green, often glaucous, lanceolate, elliptic-lanceolate, or elliptic-ovate, subterete, 4.2-13 × 1.5-3.5 mm, base very short-spurred, base of withered blade at times becoming scarious, apex obtuse or obtusely apiculate, (surfaces papillose).
erect, simple or branched, 3-18 cm; leaf blades elliptic-lanceolate, base short-spurred; offsets not formed.
cymes, 5-25-flowered, (1-)3(-6)-branched; branches ascending, spreading to erect, or recurved, forked; bracts similar to leaves.
absent or to 3 mm.
5-merous; sepals erect, connate basally, pale green to yellow-green, ovate or lanceolate, equal, 2-5 × 1-2 mm, apex acute or, rarely, obtuse, (often papillose); petals widely spreading from suberect base, distinct, canary to golden yellow, lanceolate, elliptic-lanceolate, or linear-lanceolate, canaliculate, 6-9.2 mm, apex acute to acuminate with minute mucronate appendage; filaments yellow; anthers yellow, sometimes suffused with red; nectar scales deep yellow to yellow-green, obovately square.
erect in fruit, basally connate, brown.
Varieties 2 (2 in the flora): w, wc North America.
forms offsets in the axils of rosette leaves. The mature carpels have divergent beaks and narrow lips along the adaxial suture.
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