Flora of North America species comparison

decumbent, branched, bearing terminal rosettes.

creeping and ascending, branched, not bearing rosettes.

erect, branched, 10–43 cm;

leaf blades linear, base with scarious spurs;

offsets rosettes, produced from axils of leaves and bracts.

creeping or ascending, simple, 10–25 cm;

leaf blades narrowly oblanceolate-elliptic, base short-spurred;

offsets not formed.

alternate, spreading to erect, sessile;

blade green, not glaucous, linear to elliptic-oblong (subulate when dry), subterete, 4.3–13.8 × 1.4–2.7 mm, base (persistent), spurred (spur simple, small), scarious, apex acute, (surfaces sometimes papillose marginally).

in whorls of 3, spreading, sessile;

blade pale yellowish green, not glaucous, narrowly rhombic-elliptic to widely lanceolate, subterete, 10–25 × 4–6 mm, base spurred, not scarious, apex subacute.

solitary flowers or cymes, 9–15(–25)-flowered, mostly 3-branched;

branches slightly recurved, not forked;

bracts linear-lanceolate, smaller than leaves, base spurred.

dense cymes or corymbs, 8–40-flowered, (1–)2–4-branched;

branches spreading to widely ascending, sometimes forked;

bracts similar to leaves, smaller.

absent or to 0.5 mm.

absent or to 0.5 mm.

5-merous;

sepals erect, distinct, pale green or yellow-green, lanceolate or ovate, equal, 2–3.7 × 0.9–1.7 mm, apex acute or long-acuminate;

petals stellately spreading, distinct, deep yellow with green to brown dorsal keel to almost white, lanceolate or elliptic, slightly carinate, 5.4–8 mm, apex obtuse, acute, or long-acuminate, sometimes with aristate appendage;

filaments yellow;

anthers yellow;

nectar scales greenish yellow or yellowish white, reniform-subquadrate or square.

5-merous;

sepals spreading, distinct basally, green, widely lanceolate to oblong, often unequal, 3.5–5 × 0.8–1.5 mm, apex acute or obtuse;

petals spreading, slightly connate, yellowish, lanceolate to oblong, not carinate, 5–8 mm, apex long-mucronate;

filaments yellow;

anthers reddish;

nectar scales orange, rectangular-spatulate.

divergent in fruit, shortly connate, pale green, yellow-green, or brown.

stellately patent in fruit, distinct, yellow-green.

= 50–54, 58, 62–70, 63–64.

= ca. 72.