Sargassum crispifolium Yamada, 1931

Belleza, Dominic Franco C., Tateishi, Hiroto, Tanimae, Shin-Ichiro, Kobayashi, Taishun, Aota, Tomoyuki, Urasawa, Toshiki & Nishihara, Gregory N., 2025, An annotated list of brown seaweeds (Phaeophyceae) from Nakadori Island (northern Goto Islands, Nagasaki, Japan), Phytotaxa 694 (1), pp. 1-24 : 13

* Sargassum crispifolium Yamada, 1931

Japanese name: コブクロモク (kobukuromoku)

Syntype locality: — Various locations across Japan ( Sagami Prov. ; Tosa Prov. ; Hizen Prov. ; Satsuma Prov.; Hiuga Prov.)

Description and remarks: —Thalli specimens were up to 52 cm tall with smooth axes, 1.5–2 mm in width. The leaves may be crispate or entire and margins may be heavily or lightly dentate with clearly visible midribs and cryptostomata scattered around the leaf surface. The air bladders are about 1.5–2 mm in diameter and found around the primary laterals. This species was found in Yokoura and in Mushima old port in early summer, together with other species of Sargassum .

Materials examined: —18ECS1-20 (1 to 3)