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, widest at base, (20–)25–70 × 4.5–10 cm;

blade grayish, gray- or blue-glaucous, yellowish green, or greenish, occasionally cross-zoned, linear-lanceolate to lanceolate, rigid, adaxially concave, abaxially convex;

margins straight or undulate to crenate, armed, teeth single, weakly attached, well defined, of 2 types, 2–3 mm or (5–)6–8 mm, (1–)1.5–3 cm apart;

apical spine light or dark brown to gray, subulate to acicular, 2–4 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.

2–6 m. Inflorescences paniculate, not bulbiferous, open;

bracts persistent, triangular, 8–15 cm;

lateral branches 6–15, slightly ascending, comprising distal 1/5–1/4 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.

12–48 per cluster, erect, 3–6 cm;

perianth yellow, tube shallow, campanulate or funnelform, 3–10 × 9–15 mm, limb lobes wilting soon after anthesis, spreading, equal, 13–20 mm;

stamens long-exserted;

filaments inserted unequally above middle or at rim of perianth tube, erect, yellow, 2.5–3.5(–4.2) cm;

anthers yellow, 13–21 mm;

ovary 1.6–4 cm, neck slightly constricted, 4–6 mm.

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

short-pedicellate, ovoid to oblong or obovoid, 3.5–5.5 cm, apex beaked.

4.5–6 mm.

5–6 mm.

= 110–120.