Flora of North America species comparison

decumbent, branched, bearing terminal rosettes.

erect or horizontal proximally and erect distally, simple or branched, bearing elevated rosettes.

erect, branched, 10–43 cm;

leaf blades linear, base with scarious spurs;

offsets rosettes, produced from axils of leaves and bracts.

erect or slightly recurved, simple, 5.5–19 cm, (sometimes ciliate, papillose);

leaf blades lanceolate, base spurred (spurs unlobed or 3-lobed);

offsets caducous, axillary.

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, ascending, sessile;

blade yellow-green (rosette leaves with 5 green to purple veins), not glaucous, oblong-elliptic, oblong-lanceolate, lanceolate, or ovate, subterete, 4.4–14 × 1.8–3 mm (somewhat longer and wider on flowering shoots), base short-spurred, scarious, apex acuminate or acute, (unlobed to 3-lobed on flowering shoots, surfaces sometimes ciliate marginally, papillose).

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, 4–25-flowered, 3-branched;

branches recurved or not, sometimes dichotomously forked;

bracts similar to leaves, smaller.

absent or to 0.5 mm.

to 1 mm, (sometimes ciliate, papillose).

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, distinct, green to yellow, lanceolate or ovate, equal, ca. 1.5–3.5 × 0.8–2 mm, (base broadly spurred), apex acuminate or acute, (sometimes papillose apically);

petals spreading, distinct, white, creamy white, or yellow, elliptic-lanceolate, carinate basally, 5–11 mm, apex acute with mucronate appendage;

filaments white;

anthers yellow, orange, or red;

nectar scales orange or yellow, square.

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

stellately spreading in fruit, connate basally, straw colored streaked with reddish brown.

= 50–54, 58, 62–70, 63–64.

= 16.