Leaves 1.2-2.5 cm wide; blade deep green, without bud-prints, margins nonfiliferous, apical spine brown, stout and firm, 1.2-1.9 cm. Scape 2-4 m. Inflorescences subspicate to narrowly racemose-paniculate; peduncle 0.4-4 cm. Flowers 2(-6) per cluster, 3.5-5 cm; perianth tube 11 × 13 mm, limb lobes deep yellow; filaments inserted 8 mm above perianth base; ovary 1.6 cm. Flowering late spring--summer. Gravelly to rocky places, mostly in desert scrub, grasslands, juniper and oak woodlands; 1100--2000 m; Ariz. Agave schottii var. treleasei may be of a hybrid origin involving A. chrysantha or A. palmeri and A. schottii var. schottii.

LEAVES: several, 12-25 mm wide, linear, deep green, without bud imprinting, somewhat stiff, incurved to slightly falcate; terminal spine 12-19 mm long, rather stout and firm, brown. INFLORESCENCE: with the scape 2-4 m tall, 2.6-3.3 cm in diameter, subspicate to narrowly racemose-paniculate, the longer branchlets 27-40 mm long, the shorter ones 0.7-1.2 mm long. FLOWERS: 35-50 mm long, usually 2(-6) per cluster; tepals 12 mm long, deep yellow, unequally spreading; filaments inserted 8 mm above base of tube; ovary 16 mm long with a somewhat curved neck 8 mm long; floral tube 11 mm high, 13 mm wide. NOTES: See also parent taxon. High desert scrub, grassland, juniper and oak woodlands: Pima, Cochise cos; 1100- 2000 m (3600-6500 ft); May-Jul. REFERENCES: Hodgson, Wendy. 1999. Agavaceae. Ariz. – Nev. Acad. Sci. 32(1).