Flora of North America species comparison

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.

spreading, 90–130 × 9–12 cm;

blade green, slightly cross-zoned when immature, lanceolate, firm, adaxially plane, abaxially slightly convex;

margins straight, finely fibrous, typically unarmed, teeth single prickles when present, 1–2 mm, 2–5+ cm apart;

apical spine dark brown, subulate, 2–2.5 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.

5–6 m. Inflorescences paniculate, open, often bulbiferous;

bracts persistent, triangular, 0.5–2 cm;

lateral branches 10–15(–25), ascending, comprising distal 1/2 of inflorescence, longer than 10 cm.

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.

erect, 5.5–6.5 cm;

perianth greenish yellow, tube urceolate, 15–18 × 10–12 mm, limb lobes erect, equal, 17–18 mm;

stamens long-exserted;

filaments inserted ca. mid perianth tube, erect, yellow, 5–6 cm;

anthers yellow, 20–25 mm;

ovary 2–2.5 cm, neck slightly constricted, 2–4 mm.

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

not seen.

5–7 mm.

unknown.

= 60.

= 138, 147, 149, 150.