Compt. Rend. Hebd. Séances Acad. Sci., Sér. D 278: 2508. 1974 ,.
Herbs, monocarpic, white-mealy, glaucous or not. Stems mostly simple, round, to 7 dm × 1.5 cm. Leaves subrosulate, crowded near base, simple; petiole indefinite, broad, with clasping base; blade green or gray-green, sometimes with maroon or dark green blotches, lanceolate, 15–50 × 5–10 cm, margins sinuate to coarsely crenate, apex acute, surfaces mealy, glaucous or not; bulbils borne in notches of leaf margins, rooting while still attached. Cymes open, corymbiform, 2 dm diam.; branches to 8 cm. Pedicels 5–15 mm. Flowers: calyx pale green, inflated, 18–25 mm, tube 13–15 mm, lobes deltate, contracted basally, 5–10 mm, shorter than tube, apex acute; corolla yellow-green marked with violet-red, 40–50 mm, contracted basally, (sparsely glandular-puberulent), lobes triangular-ovate, 8–11 mm, apex acuminate. 2n = 34.
Phenology: Flowering winter.
Habitat: Disturbed areas
Elevation: 0 m
Introduced; Fla., Indian Ocean Islands (Madagascar)
Apparently, Bryophyllum gastonis-bonnieri is or was established only locally in Florida, on Sanibel Island.