Flora of North America species comparison

rootstocks, horizontal, simple, bearing basal rosettes (axillary shoots with subterranean, white stems that detach easily and bear terminal rosettes of colorless leaves).

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

erect, simple, (5–)11(–18) cm;

leaf blades ovate or elliptic, base not 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, spreading, outermost ones petiolate (petiole 4–5 mm);

blade green or greenish white, not glaucous, oblanceolate, obovate, or narrowly spatulate, laminar, 2–16 × 1.4–3.2 mm, base not spurred, not scarious, apex blunt, (surfaces papillose).

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, 5–60-flowered, 3–6-branched;

branches often strongly recurved, each 1 or 2 times dichotomously 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.

to 0.3 mm.

0.6–6.3 mm.

(5–)6(–7)-merous;

sepals erect, slightly connate basally, green, ovate, equal, 1.5–2 × 0.7–1.1 mm, apex acute;

petals spreading, distinct nearly to base, canary yellow, keel green or dark red, lanceolate to oblong, carinate, 4–6 mm, apex subobtuse to acute;

filaments yellow;

anthers yellow;

nectar scales deep yellow, subquadrate.

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 spreading in fruit, connate basally, brown.

erect in fruit, distinct, brown.

= 16.