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.

mostly spreading;

blade light to dark green, without bud-prints, linear and 40–55 × 5–6 cm or lanceolate to deltate and 35–50 × (5–)7–10(–12.5) cm, rigid, adaxially concave toward apex, abaxially convex toward base;

margins straight, nonfiliferous, conspicuously armed, teeth single, 3–10(–15) mm, 1–3 cm apart;

apical spine grayish, conical to subulate, 2.5–4.5 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.

4–6 m. Inflorescences subspicate to narrowly racemose-paniculate, sparsely flowered;

bracts persistent, triangular to narrowly triangular, 1–4 cm;

lateral branches 70–90+, comprising distal 1/3–1/2 of inflorescence, 10 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.

(6–)10–12 per cluster, erect, 4–4.7 cm;

perianth yellow to yellowish lime green, tube funnelform, (3.2–)6–8 × 10–13 mm, limb lobes ascending, subequal, 16–23 mm;

stamens long-exserted;

filaments inserted on rim of perianth tube, spreading, yellow to lime green or maroon, 4–5.8 cm;

anthers yellow, 20–21 mm;

ovary 1.3–2(–2.2) cm, neck constricted, 3.5–6 mm.

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

sessile or short-pedicellate, oblong, 2.5–4 cm, apex beaked.

4.5–6 mm.

5–6 mm.

= 110–120.