Flora of North America species comparison

mostly ascending to erect, (25–)30–50 × 2–4(–5.2) cm;

blade light green to yellowish green, sometimes checkmarked but without bud-prints, linear-lanceolate, stiff, adaxially concave toward apex, abaxially convex toward base;

margins straight, easily detached, nonfiliferous, conspicuously armed, teeth single 2–6 mm, mostly (1–)2–4 cm apart, rarely absent;

apical spine grayish, conical to subulate, 1.5–4.5 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.

(2–)2.5–3.5 m. Inflorescences spicate, densely flowered on distal 1/2;

bracts caducous, linear, 1–3 cm;

peduncle 2–5 mm, rarely 20–150 mm.

1.5–3 m. Inflorescences spicate, laxly to rather densely flowered on distal 1/3;

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

peduncle 5 mm or shorter.

2–3 per cluster, erect to slightly recurved, (2.4–)3–4.5 cm;

perianth yellow, frequently tinged with red or purple, tube campanulate, 1.5–4 × 6–12 mm, limb lobes ascending, subequal, 11–20 mm;

stamens long-exserted;

filaments inserted on rim of perianth tube, spreading, yellow to reddish, 2.5–4.2 cm;

anthers pale yellow, (11–)15–20 mm;

ovary (0.8–)1.5–2.2 cm, neck constricted (2–)4–8.5 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.

sessile or short-pedicellate, oblong, 1.8–2.5(–3) cm, apex beaked.

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

4.5–6 mm.

2.5–3 mm.

= 110–120.