Conferva polymorpha Linnaeus, Species Plantarum 2: 1167. 1753.

"Habitat in Mari Europaeo." RCN: 8391.

Type not designated.

Original material: [icon] in Barrelier, Pl. Galliam: 120, t. 1301. 1714; [icon] in Boccone, Mus. Fis.: 268, 315, t. 5, f. 11; t. 7, f. 1. 1697; [icon] in Dillenius, Hist. Musc.: 32, t. 6, f. 35. 1741; [icon] in Plukenet, Phytographia: t. 47, f. 10. 1691; Almag. Bot.: 119. 1696.

Current name: Polysiphonia lanosa (L.) Tandy ( Rhodomelaceae).

Note: This name is of uncertain identity (see Tandy in J. Bot. 69: 225. 1931; Silva & al. in Univ. Calif. Publ. Bot. 79: 392. 1996) but potentially threatens Polysiphonia lanosa (L.) Tandy and Ceramium virgatum Roth, and may prove to be a candidate for rejection.