Plants slender, 40–150 cm. Bulbs 7–9(–15) mm diam. Stems slender, usually 3–6-branched, rarely simple. Leaves (3–)5–7, basal leaves 2–3, longest; blade ± linear, 3–10 mm wide; cauline leaves progressively reduced distally, becoming bractlike. Rhipidia usually 2-flowered; outer spathe ± 1/2 or slightly less than inner, inner 25–30 mm, apex dry. Tepals dark blue, lanceolate, 20 × 7.5 mm; filaments connate in proximal 1/2 or entirely, ca. 2 mm; anthers ca. 8 mm; ovary ovoid, ca. 2.5 mm; style branching at apex of filament tube; branches ca. 5 mm. Capsules ovoid, truncate, 6–9 mm. Seeds angular-prismatic, ca. 2 mm. 2n = 56.
Phenology: Flowering (Jul–)Aug–Oct.
Habitat: Wet, calcareous, pine flatwoods, wet hummocks
Of conservation concern.
The flowers of Nemastylis floridana open ca. 4 p.m. and close ca. 6 p.m.