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.

erect or recurving, 110–160 × 12–18 cm;

blade green or grayish green or yellowish green, not cross-zoned, lanceolate, pliable, adaxially concave or guttered at least toward apex, abaxially slightly convex;

margins straight, finely fibrous, minutely armed only near base or teeth absent, teeth single prickles, 1–2 mm, less than 1 cm apart;

apical spine brown to grayish, subulate, 3–4.5 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.

6.5–8 m. Inflorescences paniculate, open, sometimes bulbiferous;

bracts persistent, triangular, 0.5–2 cm;

lateral branches 15–25, horizontal to slightly ascending, comprising distal 1/3–1/2 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.

15–27 per cluster, erect, 7–8 cm;

perianth yellow, tube urceolate, 15–20 × 14–19 mm, limb lobes erect, subequal, 20–24 mm;

stamens long-exserted;

filaments inserted ca. mid perianth tube, erect, yellow to yellow-green, 5.5–6 cm;

anthers yellow, 30–31 mm;

ovary 3.3–4 cm, neck unconstricted, 2–4 mm.

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

short-pedicellate, oblong, 5.5 cm, apex beaked.

4.5–6 mm.

unknown.

= 110–120.