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.

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.

5–9 m.

6.5–8 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.

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.

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.

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.

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

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

6–8 mm.

unknown.