Flora of North America species comparison

erect, spreading to ascending, occasionally reflexed, 80–200 × 15–25 cm;

blade light green to green or glaucous-gray, sometimes variegated or cross-zoned, narrowly to broadly lanceolate, smooth, rigid;

margins nearly straight or undulate to crenate, armed, teeth single, 5–10 mm, 1–4 cm apart;

apical spine dark brown to grayish, conical or subulate, 2–6 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.

5–9 m.

2.5–3.5 m.

paniculate, not bulbiferous;

bracts persistent, triangular, 5–15 cm;

lateral branches 15–35, horizontal to slightly ascending, comprising distal 1/3–1/2 of inflorescence, longer than 10 cm.

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.

erect, 7–10.5 cm;

perianth yellow, tube funnelform to cylindric, 8–20 × 12–20 mm, limb lobes erect, subequal, 20–35 mm;

stamens long-exserted;

filaments inserted above mid perianth tube, erect, yellow, 6–9 cm;

anthers yellow, 25–35 mm;

ovary 3–4.5 cm, neck constricted, 3–6(–8) 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.

short-pedicellate, oblong, 3.5–8 cm, apex beaked.

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

6–8 mm.

unknown.

= 90.