Stems angular, minutely puberulent. Leaves not pungent, minutely puberulent; stipules linear, 2–5 × 0.5–1 mm, eglandular; petiole eglandular; blade roughly symmetric, 2–7 × 3–10 cm, shallowly to deeply 2-lobed, margins entire; abaxial fine veins prominently raised, abaxial nectaries not along leaf margins, usually in lines extending into leaf lobes on at least flowering stems. Floral bracts setaceous, 1–3 × 0.5 mm, margins entire, eglandular. Flowers: floral tube cuplike, 1–3 mm deep; sepals white, 13–17 × 4–6 mm; petals white, 9–13 × 4–6 mm; corona filament whorls 2, outer filaments green basally, yellow apically, linear-spatulate, laterally flattened, 5–8 mm. Berries blue-black, ovoid to ellipsoid, 20–30 × 15–20 mm. 2n = 12.

Flowering Jun–Aug. Intact or disturbed tropical woodlands in loamy soil over limestone; 0–10 m; introduced; Fla.; Mexico; West Indies (Bahamas); Central America; South America (Colombia, Ecuador, Venezuela).

In the flora area, Passiflora biflora occurs only in southeastern Florida, where it is locally abundant and often an aggressive weed.