Flora of North America species comparison

erect, spreading to ascending, occasionally reflexed, 80–200 × 15–25 cm;

blade light green to green or glaucous-gray, sometimes variegated or cross-zoned, narrowly to broadly lanceolate, smooth, rigid;

margins nearly straight or undulate to crenate, armed, teeth single, 5–10 mm, 1–4 cm apart;

apical spine dark brown to grayish, conical or subulate, 2–6 cm.

ascending to erect, 7–65 × 4–20 cm;

blade glaucous-gray to light green, not cross-zoned, linear-lanceolate to lanceolate or broadly ovate, rigid, adaxially nearly plane to concave toward apex, abaxially convex;

margins straight or undulate, rarely unarmed, teeth single, well defined, 3–7(–8) mm, 1–3 cm apart;

apical spine dark brown to gray, subulate or acicular, 1.5–4 cm.

5–9 m.

(2–)3–6 m.

paniculate, not bulbiferous;

bracts persistent, triangular, 5–15 cm;

lateral branches 15–35, horizontal to slightly ascending, comprising distal 1/3–1/2 of inflorescence, longer than 10 cm.

broadly paniculate, somewhat open to dense, not bulbiferous;

bracts persistent, triangular, 3–10 cm;

lateral branches (7–)10–36, horizontal to slightly ascending, comprising distal 1/2 of inflorescence, longer than 10 cm.

erect, 7–10.5 cm;

perianth yellow, tube funnelform to cylindric, 8–20 × 12–20 mm, limb lobes erect, subequal, 20–35 mm;

stamens long-exserted;

filaments inserted above mid perianth tube, erect, yellow, 6–9 cm;

anthers yellow, 25–35 mm;

ovary 3–4.5 cm, neck constricted, 3–6(–8) mm.

27–48 per cluster, erect, 4.3–8.1 cm;

perianth pink to red or red to orange in bud, yellow to yellowish green at anthesis, tube campanulate, 6–18 × 11–21 mm, limb lobes erect to ascending, unequal, 13–27 mm;

stamens long-exserted;

filaments inserted (sometimes irregularly) above mid perianth tube to just below rim, erect, yellow or green, 3.5–5.8 cm;

anthers yellow, 12–34 mm;

ovary (2–)3–4.5(–4.8) cm, neck slightly constricted, 4–9 mm.

short-pedicellate, oblong, 3.5–8 cm, apex beaked.

short-pedicellate, ovoid or oblong to obovoid, 2.5–5 cm, apex beaked.

6–8 mm.

7–8 mm.