Flora of North America species comparison

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

root-stocks, ascending, much-branched, bearing rosettes.

erect, usually simple, 5–10(–15) cm;

leaf blades triangular-ovate, base short-spurred;

offsets not formed.

erect or decumbent, simple or branched, 4–30(–40) cm;

leaf blades oblanceolate, spatulate, obovate, or suborbiculate, base not 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, erect to spreading, sessile;

blade green, glaucous or not, not pruinose, oblanceolate, spatulate, or obovate, subterete or somewhat flattened, 10–50 × (4.5–)6–33 mm, base not spurred, not scarious, apex truncate to rounded or obtuse, emarginate or barely notched.

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

branches not recurved, rarely forked;

bracts similar to leaves, smaller.

elongate, paniculate cymes, 12–80-flowered, monochasially 3+-branched;

branches not recurved, 2-forked;

bracts similar to leaves, smaller.

absent or to 1 mm.

0.6–6.3 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.

5-merous;

sepals erect, (closely appressed to corolla tube), slightly connate basally, pale green, ovate or lanceolate, equal, (2–)2.6–5.1 × 2 mm, apex acute or subacute, (rarely obtuse in var. flavidum);

petals basally erect, divergent in distal 1/2, connate basally, pink, pinkish white, or white to yellowish white, lanceolate-oblong, oblanceolate-oblong, or elliptic-oblong, not carinate, 4–11 mm, apex obtuse, shortly mucronate or aristate;

filaments white, greenish white, or pink;

anthers red, reddish purple, red-brown, or yellow;

nectar scales white, yellow, or pink, reniform or transversely oblong.

stellately patent in fruit, distinct, yellowish.

erect in fruit, distinct, brown.

= 40, 60, 80, 100, 120.