Sargassum polycystum C. Agardh [var. parvifolium] forma runcinatum Grunow in Askenasy, 1888: 26 (`runcinata') (type locality: Western Australia).
Sargassum parvifolium (Turner) C. Agardh [var. parvifolium] forma runcinatum (Grunow) De Toni, 1895b: 72.
INDIAN OCEAN DISTRIBUTION: Australia.