Trelease agave

Agave treleasei Toumey, Rep. (Annual) Missouri Bot. Gard. 12: 75, plates 32, 33. 1901 (as treleasii)

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.