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.

erect or erect-ascending, 50–63(–73) × 7.5–9 cm;

blade glaucous-gray to -bluish, cross-zoned, lanceolate or oblanceolate, rigid, adaxially concave, abaxially convex;

margins straight or repand, armed, teeth single, well defined, 3.5–5 mm, 1–3 cm apart, interstitial teeth (3–)6–12, mostly along distal 2/3 of margins;

apex conspicuously incurved, spine brownish gray, slender, 2.8–3.5(–4.9) 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.

4.5–6 m. Inflorescences broadly paniculate, not bulbiferous, open;

bracts persistent, triangular, 1–5.5 cm;

lateral branches 12–17, horizontal, comprising distal 3/5–5/8 of inflorescence, longer than 10 cm.

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.

14–20 per cluster, erect, 4.7–6.7(–7) cm;

perianth cream, tinged with light green, tube not shallow, campanulate, 11–16 × 11–16 mm, limb lobes persistent and often leathery during and after anthesis, spreading, unequal, 9–18 mm, apex flushed with maroon;

stamens long-exserted;

filaments inserted at 1 level ca. mid perianth tube, erect, yellow, 3–5.3 cm, apex flushed with maroon;

anthers yellow, 11–20 mm;

ovary 2.1–2.9 cm, neck slightly constricted, 1–3.5 mm.

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

not seen.

4.5–6 mm.

unknown.

= 110–120.