Flora of North America species comparison

decumbent, branched, bearing terminal rosettes.

rootstocks, horizontal, branched, bearing terminal rosettes.

erect, branched, 10–43 cm;

leaf blades linear, base with scarious spurs;

offsets rosettes, produced from axils of leaves and bracts.

(terminal or axillary), ascending, simple or branched, 2–10(–12) cm;

leaf blades truncately obovate or spatulate, 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, ascending, sessile;

blade green, blue-green, green suffused with red, or red, margins not white, not pruinose, not glaucous, obovate, spatulate, or oblanceolate, subterete to somewhat flattened, (4–)12–22(–33) × 4–10 mm, base not spurred, not scarious, apex rounded or truncate, obscurely mucronate, retuse, or emarginate.

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

branches slightly recurved, not forked;

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

paniculate cymes, 5–45-flowered, 4–15-branched;

branches not recurved, simple or 1–2-forked;

bracts spatulate to linear-oblong, 3–5 mm, base not spurred;

offsets not formed.

absent or to 0.5 mm.

2–5 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.

ca. 5-merous;

sepals erect, (loosely appressed to corolla), slightly connate basally, pale green or purplish, glaucous, ovate or lanceolate, (slightly subterete), equal, 1.8–5.3(–6) × 2 mm, apex acute to obtuse;

petals (convolute in bud), erect proximally, connate basally, spreading distally, greenish white or creamy white to yellow or pale orange, or pale orange suffused with pink, oblanceolate-oblong, spatulate or obovate, somewhat carinate, 4–10 mm, apex abruptly mucronate;

filaments white or yellow;

anthers yellow;

nectar scales white, truncately reniform.

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

erect in fruit, distinct, brown.

= 50–54, 58, 62–70, 63–64.

= 30, 60 (in var. retusum).