Polysiphonia nigrescens

Polysiphonia nigrescens

Observation - Polysiphonia nigrescens - UK and Ireland. Description: Photos 1 - 3 show the structure and branching pattern of the seaweed. Photo 4 shows the frond tips and arrangement of polysiphons. Photo 5 shows a cross section through a frond taken near the base of a frond.

Photos 1 - 3 show the structure and branching pattern of the seaweed. Photo 4 shows the frond tips and arrangement of polysiphons. Photo 5 shows a cross section through a frond taken near the base of a frond. Photo 6 shows the interlocking basal discs, Photos 7&8 show single celled outgrowths at the tips which could form the tufts.