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, 18–30 × 4.5–7 cm;

blade glaucous and yellow- or gray-green, not cross-zoned, lanceolate to broadly lanceolate, rigid, adaxially concave toward apex, abaxially convex;

margins straight, armed, teeth single, well defined, 2–8 mm, 1.5–2.5 cm apart;

apical spine reddish brown to gray, acicular, 2.5–5 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.

(1.8–)4–5 m. Inflorescences narrowly to somewhat broadly paniculate, dense, not bulbiferous;

bracts persistent, lanceolate, 1–3(–5) cm;

lateral branches 30–40, slightly ascending, comprising distal 1/3–1/2 of inflorescence, longer than 10 cm, or short-scaped individuals (1.8–3.5 m) with only 7–20 lateral branches on distal 1/4.

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.

6–45 per cluster, erect, 4–5.5(–5.8) cm;

perianth red in bud, yellow to yellow-green at anthesis, tube broadly campanulate, 4–7 × 9–15 mm, limb lobes spreading to ascending, slightly unequal, 14–18 mm;

stamens long-exserted;

filaments inserted just below rim of perianth tube, erect, yellow, (2.8–)3–4.5 cm;

anthers yellow, 16–20 mm;

ovary 2.5–3.2 cm, neck constricted, 3–5 mm.

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

sessile or short-pedicellate, oblong, 2.7–4.4 cm, apex beaked.

4.5–6 mm.

5–6.5 mm.

= 110–120.

= 60.