Flora of North America species comparison

decumbent, branched, bearing terminal rosettes.

prostrate, becoming erect, branched, bearing rosettes in clusters and secondary shoots in leaf axils.

erect, branched, 10–43 cm;

leaf blades linear, base with scarious spurs;

offsets rosettes, produced from axils of leaves and bracts.

erect, simple or branched, ca. 18 cm;

leaf blades elliptic to suborbiculate or elliptic-linear, base not 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, (easily detaching and sometimes forming new plants), divergent, slightly upturned, sessile;

blade blue-green, purplish, or green, sometimes glaucous, ovate, elliptic-ovate, or lanceolate, subterete, 3.2–6.2 × 1.9–2.9 mm, base not spurred, not scarious, apex obtuse or apparently acute.

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

branches slightly recurved, not forked;

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

cymes, 3–22-flowered, 3-branched;

branches not or slightly recurved, not forked;

bracts narrowly elliptic to linear.

absent or to 0.5 mm.

absent or 3–5 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 erect, slightly connate basally, green, lanceolate or lanceolate-oblong, equal, ca. 3 × 1.5 mm, apex obtuse or subacute;

petals widely spreading from short, erect base, distinct, deep yellow, elliptic-lanceolate or lanceolate, slightly cucullate, 6.7–8.8 mm, apex obtuse or, rarely, acute with minute mucronate appendage;

filaments yellow;

anthers yellow;

nectar scales yellow, subquadrate.

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

erect in fruit, connate basally, brown.

= 50–54, 58, 62–70, 63–64.

= 32, 36.