Flora of North America species comparison

rhizomatous, procumbent or creeping, much-branched, bearing terminal rosettes.

ascending or decumbent, branched, not bearing rosettes.

erect, simple, 3–14 cm;

leaf blades spatulate-oblong or elliptic-oblong, base not spurred;

offsets not formed.

ascending or pendulous, simple, 10–30 cm;

leaf blades linear, base short-spurred;

offsets not formed.

alternate, spreading, petiolate;

blade green, often glaucous or pruinose, spatulate, terete to laminar, 7–19 × 4.5–10 mm, base not spurred, not scarious, apex rounded or truncate, submucronate, (surfaces papillose marginally).

in whorls of 3(–4), spreading, sessile;

blade green, not glaucous, linear-lanceolate to linear, ± laminar, 7–30 × ca. 2 mm, base short-spurred, not scarious, apex obtuse to subacute.

cymes, ca. 30-flowered, ca. 3-branched;

branches not recurved, forked;

bracts oblong-spatulate or linear, ca. 3 cm, base not spurred.

lax cymes, 10–60+-flowered, (1–)2(–3)-branched;

branches spreading to widely ascending, sometimes forked;

bracts similar to leaves.

2–8 mm.

absent.

5-merous;

sepals spreading to erect, connate basally, green or yellow-green, glaucous or pruinose, lanceolate, linear-lanceolate, oblong-ovate, or obovate, equal, ca. 2.5 × 1.5 mm, apex acute or obtuse;

petals widely spreading from short, erect base, distinct or slightly connate basally, yellow, linear to oblanceolate, not carinate, 4.5–9 mm, apex acute;

filaments yellow;

anthers yellow;

nectar scales yellow, reniform or nearly square.

5-merous;

sepals spreading, distinct basally, yellowish green, linear-lanceolate, often unequal, 1.5–7(–11) × 2 mm, apex subobtuse to subacute;

petals spreading, distinct, yellow, oblong, not carinate, 4–9 mm, apex subobtuse;

filaments yellow;

anthers dark yellow;

nectar scales yellow, square-spatulate.

divergent in fruit, connate basally, brown.

divergent in fruit, distinct, yellowish green.

= 30.

= 72.