Flora of North America species comparison

(28–)35–41(–53) cm × 7–14 mm, mature plants with blackish, shriveled foliage persisting at base of scape;

blade glaucous-green, aging to light green.

24–52 cm × 4–8 mm, mature plants without blackish, shriveled foliage at base of scape;

blade grayish green.

40–89 cm, often with 1–3 ascending branches, 3–5 mm thick at base.

47–87 cm, rarely branched, 2–4 mm thick at base.

terminal raceme (5–)14–27(–40) cm;

flowers (24–)44–51(–78) per 10 cm of raceme.

terminal raceme (5–)8–16(–32) cm;

flowers (10–)25–30(–40) per 10 cm of raceme.

tepals yellowish white with pale yellowish or purplish central vein, oblong-lanceolate, 8–12 × 2 mm;

stamens seldom exposed at anthesis;

filaments 5–7 mm;

anthers pale yellowish.

ellipsoid to obovoid-ellipsoid, 9–11 × 6–8 mm.

dark gray-green to black, 4–6 mm.

dark grayish green, sometimes yellowish brown to black, 4–5 mm.

ellipsoid, 26–56 × 17–31 mm, sometimes with blackish, fibrous tunic.

ellipsoid-ovoid, 26–43 × 15–27 mm, sometimes with blackish tunic.

= 52.