Flora of North America species comparison

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

erect, pendulous, or prostrate, much-branched, not bearing basal rosettes.

erect, simple or branched, 3–18 cm;

leaf blades elliptic-lanceolate, base short-spurred;

offsets not formed.

(axillary), ascending, usually simple, sometimes branched, 10–50 cm;

leaf blades elliptic-oblanceolate, base not 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).

alternate, spreading, sessile;

blade green tinged with red, not glaucous, elliptic-oblanceolate, laminar, 40–80 × 13–25 mm, base not spurred, not scarious, apex rounded.

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

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

bracts similar to leaves.

elongated paniculate cymes, 50–300+-flowered, 3–25-branched;

branches not recurved, forked;

bracts similar to leaves, smaller.

absent or to 3 mm.

absent or to 1 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.

(4–)5(–6)-merous;

sepals erect, usually distinct, green, ovate, lanceolate, or elliptic-oblong, unequal, 1.5–9.6 × 1–3.2 mm, apex obtuse;

petals widely spreading, distinct or slightly connate basally, yellow, lanceolate, carinate, ca. 7.5 mm, apex acute or obtuse, mucronate;

filaments yellow;

anthers yellow;

nectar scales yellowish or translucent, subquadrate or reniform.

erect in fruit, basally connate, brown.

widely divergent in fruit, distinct, brown.

= 16.

= 68.