Fucus natans Linnaeus, Species Plantarum 2: 1160. 1753.

"Habitat in Pelago libere natans, nec radicatus." RCN: 8278, 8304.

Lectotype ( Børgesen, Mind. Japetus Steenstrups Fødsel Art. 32: 7. 1914): Herb. Linn. No. 1274.35 (LINN) , see above, right.

Current name: Sargassum natans (L.) Gaillon ( Sargassaceae).