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, 12–50 × 1–5.5 cm;

blade grayish green to yellowish green or green, without bud-prints, linear-lanceolate or lanceolate, stiff, adaxially plane or concave toward apex, abaxially convex toward base;

margins straight or undulate, nonfiliferous, conspicuously armed, horny from distalmost teeth to apical spine, teeth single, 2–12(–15) mm, 1–4 cm apart, rarely absent;

apical spine light gray to ivory white, acicular or subulate, 2–20 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.

1.7–5 m. Inflorescences spicate, racemose or narrowly paniculate, open to densely flowered;

bracts caducous, narrowly triangular, 4–8 cm;

lateral branches 50+, horizontal to slightly ascending, comprising distal 1/2–2/3 of inflorescence, shorter 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.

2–12 per cluster, erect, urceolate, 2.3–4.3 cm;

perianth yellow, tube campanulate, 1–4 × 6.5–11.5 mm, limb lobes connivent, erect, subequal, 7–12 mm;

stamens slightly exserted;

filaments inserted at or 1–3 mm above base of perianth tube, erect, white, 1.3–2.4 cm;

anthers pale yellow, 5–12 mm;

ovary 1.2–2.9 cm, neck constricted, 3.5–8.5(–10) mm.

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

pedicellate, oblong to ovoid, 1–2.5 cm, apex beaked.

4.5–6 mm.

2–4 mm.

= 110–120.