Flora of North America species comparison

decumbent, branched, bearing terminal rosettes.

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

erect, branched, 10–43 cm;

leaf blades linear, base with scarious spurs;

offsets rosettes, produced from axils of leaves and bracts.

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

leaf blades linear, base 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).

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.

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

branches slightly recurved, not forked;

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

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

branches recurved, not forked;

bracts similar to leaves.

absent or to 0.5 mm.

absent or to 1 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–)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.

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

erect in fruit, distinct, brown.

= 50–54, 58, 62–70, 63–64.

= 56, 88, 112, 120.