Flora of North America species comparison

trailing (nonflowering shoots ascending at tip), laxly branched, not bearing rosettes.

decumbent, branched, bearing terminal rosettes (primary rosettes usually 1 cm diam.).

erect, usually simple, 5–10(–15) cm;

leaf blades triangular-ovate, base short-spurred;

offsets not formed.

erect or pendent, simple, 6–8.5 cm;

leaf blades narrowly elliptic or linear, (8.5–18 × 0.7–5.4 mm), base short-spurred;

offsets not formed.

(usually deciduous, if persistent, then blade white, soft, papery), alternate, (densely imbricate), spreading, sessile;

blade yellow-green, not glaucous, triangular-ovate, terete to semiterete (elliptic in cross section), (2–)5(–8) × 1–4 mm, base obtusely short-spurred, not scarious, apex obtuse.

alternate, spreading, petiolate;

blade green or grayish green, not glaucous, narrowly rhombic-elliptic, oblanceolate, or spatulate, sub-terete, 6–11 × 2.5–3.2 mm, base with simple, short spur, not scarious, apex rounded, (surfaces papillose marginally).

cymes, 2–12-flowered or flowers solitary, monochasially (1–)2(–3)-branched;

branches not recurved, rarely forked;

bracts similar to leaves, smaller.

cymes, 5–30-flowered, 3-branched;

branches not recurved, sometimes dichotomously forked;

bracts similar to leaves, smaller.

absent or to 1 mm.

absent or to 0.5 mm.

5-merous;

sepals erect to spreading, distinct basally, green, oblong-ovate, unequal, 2–3 × 1.3–2.3, mm, apex obtuse;

petals spreading, distinct, bright yellow, oblong-ovate to lanceolate, not carinate, 5–9 mm, apex acute to acuminate;

filaments yellow;

anthers yellow, (oblong);

nectar scales yellowish green, square.

4-merous;

sepals spreading, slightly connate basally, green, linear or linear-lanceolate, unequal, 3–8.5 × 0.5–2 mm, apex obtuse;

petals spreading, distinct, white, lanceolate, carinate, 3.5–7 mm, apex acute;

filaments white;

anthers red;

nectar scales white, subquadrate or square.

stellately patent in fruit, distinct, yellowish.

stellate in fruit, distinct, brown.

= 40, 60, 80, 100, 120.

= 12.