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.

ascending to spreading, 35–92 × 3.5–19 cm;

blade pale to glaucous-green or green, sometimes tinged reddish, not cross-zoned, linear-lanceolate to lanceolate, rigid, adaxially concave toward apex, abaxially convex toward base;

margins straight or somewhat undulate, armed, teeth single, well defined, firmly attached, 3–6 mm, (0.5–)1–2 cm apart, interstitial teeth 4–6, mostly along distal 2/3 of margins;

apex not conspicuously incurved, spine reddish brown to brown, acicular, 3–6 cm.

5–9 m. Inflorescences 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.

(1.7–)4–6.5(–7.2) m. Inflorescences broadly paniculate, not bulbiferous, open;

bracts persistent, triangular, 1–5 cm;

lateral branches 8–26(–32), slightly ascending, comprising distal 1/3 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.

8–16 per cluster, erect, 4.5–7.5 cm;

perianth cream to pale yellow or light green, tube not shallow, urceolate, 10–18 × 10–16 mm, limb lobes persistent and often leathery during and after anthesis, erect, strongly unequal, (6–)9–18 mm, apex often flushed with maroon;

stamens long-exserted;

filaments inserted at 2 levels, above mid perianth tube and near rim, erect, pale yellow or reddish, 4–5.5(–5.8) cm, apex often flushed with maroon;

anthers yellow, 11–25 mm;

ovary 1.8–3.6 cm, neck slightly constricted, (0.5–)4–6 mm.

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

short-pedicellate, narrowly oblong to oblong, 3.5–6 cm, apex short- to long-beaked.

6–8 mm.

5–7 mm.

= 60.