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.

spreading to ascending, 40–75(–82) × (4–)8–10(–11) cm;

blade pale to glaucous or yellowish green to green, not cross-zoned, linear-lanceolate to lanceolate, rigid, adaxially deeply guttered, abaxially convex;

margins undulate to wavy, armed, teeth single, well defined, 4–10 mm, (0.8–)1–3(–4) cm apart, interstitial teeth (0–)1–3(–5), mostly along distal 2/3 of margins;

apical spine reddish brown or brown to gray, acicular, 2.5–4.5 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.

4–7 m. Inflorescences narrowly to broadly paniculate, open, not bulbiferous;

bracts persistent, triangular, 1–5 cm;

lateral branches (6–)8–18, slightly ascending, comprising distal 1/4–1/3 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.

12–21 per cluster, erect, 3.5–6.5(–6.7) cm;

perianth golden yellow, tube not shallow, campanulate, 6–18 × (7–)10–21(–26) mm, limb lobes erect persistent and often leathery during and after anthesis, strongly unequal, (6–)9–15(–18) mm;

stamens long-exserted;

filaments inserted at 2 levels ca. mid perianth tube, erect, pale yellow, (3.2–)3.5–5 cm;

anthers yellow, 7–20 mm;

ovary (1.4–)2.2–3(–3.3) cm, neck slightly constricted, (0.5–)4–6(–8) mm.

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

sessile or short-pedicellate, narrowly oblong to obovoid, 3.5–5 cm, apex short-beaked.

4.5–6 mm.

6–7 mm.

= 110–120.

= 60.