Flora of North America species comparison

procumbent, rooting, simple, (basally often somewhat woody), bearing rosettes.

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

erect or ascending, drooping when young, simple, 15–35 cm;

leaf blades linear, base 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.

alternate, (imbricate), ascending, sessile;

blade green, sometimes glaucous, linear to oblong, terete, 10–15 × 1–3 mm, base with truncate spur, not scarious, apex mucronate.

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.

terminal corymbiform cymes, 15–25+-flowered, monochasially 3–7-branched, (sparsely glandular-hairy);

branches recurved, not forked;

bracts similar to leaves.

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–)7(–9)-merous;

sepals erect, connate basally, yellowish green, ovate, equal, 2–3(–3.3) × 1.5–2 mm, apex acute-acuminate, (glabrous or sparsely glandular-pubescent);

petals spreading, distinct, yellow, oblong, slightly carinate, 6–7 mm, apex acute;

filaments yellow;

anthers yellow;

nectar scales yellow, transversely oblong.

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.

erect in fruit, distinct, brown.

erect in fruit, distinct, brown.

= 56, 88, 112, 120.