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 and arching, 50–90 × 7–12 cm;

blade green, not cross-zoned, linearlanceolate, firm, adaxially guttered, abaxially slightly convex;

margins straight, finely and sparsely fibrous, typically unarmed, teeth single prickles when present, 1–2 mm, 1–2+ cm apart;

apical spine dark brown, subulate, 2–3 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 m. Inflorescences paniculate, compact, often bulbiferous;

bracts persistent, triangular, 0.5–2 cm;

lateral branches 20–36, ascending, comprising distal 1/2–2/3 of inflorescence, longer than 10 cm.

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.

15–21 per cluster, erect, 4–6 cm;

perianth pale yellow, tube salverform, 10–12 × 14–17 mm, limb lobes erect, equal, 13–15 mm;

stamens long-exserted;

filaments inserted near top of perianth tube, erect, yellow, 3–4 cm;

anthers yellow, 13–26 mm;

ovary 1.5–2.5 cm, neck not constricted, 1–3 mm.

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

not seen.

4.5–6 mm.

unknown.

= 110–120.

= 60.