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Inflorescence cymose, the lower branches dichasial, the higher ones monochasial, so forming an anthela of drepania. ‘Flower’ enclosed by a reduced leaf, the sheath of which is elliptic to ovate and inflated, up to 9 mm long and 3 mm wide, and whose lamina is only 5-20 mm long; Fruit with stony pericarp, obliquely ellipsoid to obliquely obovoid, quadrangular in cross section and dorsally with an inconspicuous 4-7 mm long median ridge;


Gulf of Mexico present, Indo-Pacific present, Southern America
Genus of two closely related species, S. isoetifolium, which inhabits the Indo-Pacific and S. filiforme, which is confined to the Caribbean and the Gulf of Mexico.


Hartog 1970: Sea-grasses of the World: 176
1907 – In: Engl., Pflanzenr. 11: 149
Dandy & Tandy 1939 – In: J. Bot.: 114
Benth. & Hook.f. 1883 – In: Gen. Pl.: 1019