Bulb nonrhizomatous, forming numerous bulblets, enlarging with age, 4-8 × 2-5 cm; basal plate 2-4 cm; neck 4-6 cm; tunic grayish brown. Leaves evergreen, numerous, arching outwards, spreading distally, 5-10 dm × 4-9 cm, coriaceous; blade broadly liguliform, gradually tapering proximally, apex subacute to acute. Scape 4-10 dm, slightly compressed, glaucous; scape bracts 2, enclosing buds, 4-7 × 1.5-2.5 cm; subtending floral bracts 4-5 cm × 10-15 mm. Flowers 9-15, opening sequentially, fragrant; perianth tube green, 9-20 cm; tepals extending nearly horizontally, reflexed distally, white, 7.5-13 cm × 4-6 mm; corona white with small green eye, funnelform, 2-3 × 3-4 cm, margins between free portions of filaments wavy, without prominent projections; free portions of filaments inserted on flat base, slightly incurved, green except becoming white near insertion, 4-6 cm; anthers 1.2-2 cm, pollen orange; ovary ovoid, 0.9-1.6 cm × 5-10 mm, ovules 2 per locule; style green in distal 1/2, fading to white proximally, 19-23 cm. Capsules subglobose, ca. 3 × 3 cm. Seeds obovoid, 1.8-2.4 × 1.4-1.8 cm. 2n = 46, 70.

Flowering summer. Coastal dunes, sand ridges, edges of hammocks and flatwoods, mangrove swamps of southern Florida peninsula and keys, rarely disjunct along coastal nw Florida and Gulf coastal states; 0 m; Fla.

The long perianth tube in Hymenocallis latifolia contrasts sharply with the short, funnelform staminal corona. This species is a yard favorite throughout Florida.