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, 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.

(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.

2.5–4 m. Inflorescences 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.

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.

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.

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

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

4.5–6 mm.

3–4.5 mm.

= 110–120.

= 60.