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, (3–)9–46 × 0.5–2 cm;

blade light green to yellowish green or dark green with white bud-prints on both surfaces, linear to linear-lanceolate, firm, adaxially plane toward apex, abaxially convex toward base;

margins straight, infrequently denticulate, filiferous, fibers conspicuous, white, curled, infrequently sparse or absent, teeth sparse or absent, in proximal 1/2 of blade or near base;

apex acute to long-acuminate, spine brown to grayish, subulate to filiform, 0.6–2 cm.

5–9 m.

1.5–3 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.

spicate, laxly to rather densely flowered on distal 1/3;

bracts caducous, linear-triangular, 1–3.5 cm;

peduncle 5 mm or shorter.

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.

1 or 2, slightly recurved, 1.6–2.8 cm;

perianth greenish white, tube campanulate, 3–4.5 × 6–10 mm, limb lobes erect to incurved, subequal, 6.5–10 mm;

stamens slightly exserted;

filaments inserted 1–3.5 mm above base of perianth tube, erect, white, 1.1–1.7 cm;

anthers pale yellow, 7–16 mm;

ovary 0.8–1.6 cm, neck slightly constricted, 3–7 mm.

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

sessile, oblong, 0.9–1.5 cm, apex short-beaked.

6–8 mm.

2.5–3 mm.