Grape Pip Weed

Grape Pip Weed

Observation - Grape Pip Weed - UK and Ireland. Description: Whilst this is a very distinctive alga, because I had never knowing seen it in this form before, I found it surprisingly difficult to identify. The deep purple-brown of the growing fronds, the wrinkly single face of the leaflets and its refusal to lay fla

Whilst this is a very distinctive alga, because I had never knowing seen it in this form before, I found it surprisingly difficult to identify. The deep purple-brown of the growing fronds, the wrinkly single face of the leaflets and its refusal to lay flat only made me think Chondrus crispus. But at home, with a few photos, it became increasingly obvious what it was. Indeed, going back through my photos of Chondrus (Irish Moss) made me realise why this (Mastocarpus) is known as the False Irish Moss. They are dissimilar in so many ways. yet, bleached on the strandline they are so similar. The stems to the curled frond is supposed to be channelled "the fronds are channelled with a thickened edge.." (seen in Picture 5) but few of the pieces I located displayed that feature. Only slightly more obvious is the inrolled edged to the stems. "Mature plants have conspicuous growths of short, shout papillae (reproductive bodies) on the fronds".

Edit - Title change. And 2 agreements means it can go in the seaweed's gallery - thanks
http://www.marlin.ac.uk/speciesinformation.php?speciesID=3773