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, widest near middle, 16–34 × 1.5–3 cm;

blade light green, without “budprints” but sometimes with a lighter green midstripe, linear-lanceolate, rigid, adaxially shallowly concave toward apex, abaxially thickly convex toward base;

margins entire, straight, nonfiliferous, unarmed except for small interstitial teeth near leaf base;

apex acute to long-acuminate, spine reddish brown, aging gray, subulate, 1.5–2.5 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.

2.5–3.5 m. Inflorescences subspicate to narrowly racemose-paniculate on distal 1/3;

bracts caducous, narrowly triangular, 2–3 cm;

lateral branches 30–40, ascending, 4 cm or shorter.

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.

(3–)4–6 per cluster, erect, straight, (3.2–)3.5–5.3 cm;

perianth yellow, tube funnelform, (4–)6–21 × 8–13 mm, limb lobes erect to ascending, slightly unequal, 10–20 mm;

stamens slightly exserted;

filaments inserted equally or subequally 6–16 mm above base of perianth tube, erect, light yellow, (1.7–)2–3 cm;

anthers yellow, 9–14 mm;

ovary 1–1.7 cm, neck constricted, 2–6 mm.

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

short-pedicellate, ellipsoid, 1.2–2.1 cm, apex short-beaked.

4.5–6 mm.

unknown.

= 110–120.

= 90.