Flora of North America species comparison

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

creeping, much-branched, forming terminal rosettes on branches (primary rosettes usually 1–2.7 cm diam.).

erect, usually simple, 5–10(–15) cm;

leaf blades triangular-ovate, base short-spurred;

offsets not formed.

erect, simple, 3.5–17.5 cm;

leaf blades narrowly oblong to linear, 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 to ascending, petiolate;

blade pale green or blue-green, usually glaucous, oblanceolate to spatulate, laminar, (6–)10–18 × 1–4.5 mm, base petiolelike, with simple, short spur, not scarious, apex obtuse, (surfaces papillose).

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 erect or only slightly recurved, sometimes forked;

bracts similar to leaves, smaller.

absent or to 1 mm.

absent.

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 divergent, distinct, green, linear-lanceolate, unequal, 3.6–6.3 × 0.9–1.6 mm, apex obtuse, (papillose);

petals spreading, distinct, white, lanceolate, minutely hooded, 4–9 mm, apex acuminate;

filaments white;

anthers dark red to almost purple;

nectar scales white, subquadrate.

stellately patent in fruit, distinct, yellowish.

widely divergent in fruit, slightly connate basally, brown.

= 40, 60, 80, 100, 120.

= 28, 44, 45–49.