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, 13–31 × 2–3.2 cm;

blade dark green, without bud-prints, linear-lanceolate, rigid, adaxially slightly concave toward apex, abaxially convex toward base;

margins straight, non-filiferous, conspicuously armed, horny from below mid-blade to apical spine, teeth single, (1–)2–5 mm, 1–3(–5) cm apart;

apical spine dark brown to gray, subulate, 1–2.5 cm.

5–9 m.

2.5–4 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 racemose-paniculate, openly flowered;

bracts caducous, triangular, 8–12 cm;

lateral branches 30–40, comprising distal 1/4–1/3 of inflorescence, 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.

10–20 per cluster, erect, cylindric-urceolate, 2.5–3.5 cm;

perianth pale yellow, sometimes fused with red, tube campanulate, 3.5–7.5 × 8–9 mm, limb lobes not connivent, erect to ascending, subequal, 8–11 mm;

stamens long-exserted;

filaments inserted 4 mm above base of perianth tube, erect, light yellow, 1.6–3 cm;

anthers pale yellow to yellow, 7–11 mm;

ovary 0.8–1.5 cm, neck constricted, 4–6 mm.

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

short-pedicellate, ellipsoid to obovoid, 1.5–2.2 cm, apex beaked.

6–8 mm.

3–4.5 mm.

= 60.