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).

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

erect, simple, (5–)11(–18) cm;

leaf blades ovate or elliptic, base not 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.

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, 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, 5–60-flowered, 3–6-branched;

branches often strongly recurved, each 1 or 2 times dichotomously forked;

bracts similar to leaves, smaller.

cymes, 5–30-flowered, 3-branched;

branches not recurved, sometimes dichotomously forked;

bracts similar to leaves, smaller.

to 0.3 mm.

absent or to 0.5 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.

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 spreading in fruit, connate basally, brown.

stellate in fruit, distinct, brown.

= 16.

= 12.