Flora of North America species comparison

rootstocks, decumbent and ascending, branched, (sometimes papillose), bearing terminal rosettes and above ground shoots.

ascending or decumbent, branched, not bearing rosettes.

erect, simple or branched, 3–18 cm;

leaf blades elliptic-lanceolate, base short-spurred;

offsets not formed.

ascending or pendulous, simple, 10–30 cm;

leaf blades linear, base short-spurred;

offsets not formed.

(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).

in whorls of 3(–4), spreading, sessile;

blade green, not glaucous, linear-lanceolate to linear, ± laminar, 7–30 × ca. 2 mm, base short-spurred, not scarious, apex obtuse to subacute.

cymes, 5–25-flowered, (1–)3(–6)-branched;

branches ascending, spreading to erect, or recurved, forked;

bracts similar to leaves.

lax cymes, 10–60+-flowered, (1–)2(–3)-branched;

branches spreading to widely ascending, sometimes forked;

bracts similar to leaves.

absent or to 3 mm.

absent.

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.

5-merous;

sepals spreading, distinct basally, yellowish green, linear-lanceolate, often unequal, 1.5–7(–11) × 2 mm, apex subobtuse to subacute;

petals spreading, distinct, yellow, oblong, not carinate, 4–9 mm, apex subobtuse;

filaments yellow;

anthers dark yellow;

nectar scales yellow, square-spatulate.

erect in fruit, basally connate, brown.

divergent in fruit, distinct, yellowish green.

= 16.

= 72.