Sesuvium rubriflorum (Urb.) Bohley & G. Kadereit, comb. nov.

Cypselea rubriflora Urb., Ark. Bot. 22A (17): 15. 1929.— TYPE: CUBA. Matanzas: Near Caimito de Hanabana on dried out bottoms of ponds, 08 Aug 1923, Ekman 17016 (B 10 0242330 digital image!, NY).

Procumbent herb with perennial root, root ca. 4 mm in diam; shape and size of bladder cells unknown. Leaves tiny (1–3 mm long); petiolate (1–2 mm long); lateral flaps colorless with fimbriate margins. Flowers ∼ 3.5 mm long, bright red; pedicel 3–7 mm long, very thin, almost hair-like. Stamens five. Ovary with 2 carpels and 2 short styles. Fruit an egg-shaped capsule, opening below middle. Seeds numerous, ∼ 0.2 mm long, brown.

Distribution and Habitat — Endemic to Cuba.

Notes — Resembles S. humifusum except for the red flowers, the larger number of stamens and its perennial roots.