Abstract
Laurencia viridis sp. nov. (Ceramiales, Rhodomelaceae) is described from specimens collected around the Canary Islands and herbarium examples from Azores Islands, Madeira Islands, Salvage Islands and Cape Verde Islands. Vegetative fronds, sporophytes and gametophytes (male and female) arise from stoloniferous axes. Characteristics of this new species include the following: a distinct green colour of both vegetative and fertile plants, with pinkish apical regions; presence of secondary pit-connections between adjacent cortical cells; terete branches radially arranged; spermatangial receptacle of determinate position, cup-like and with a clear central axis; tetrasporangia in parallel abaxial rows (...)
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