Seanet High Intertidal

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Porphyra perforata J. Agardh
Phylum Rhodophyta, Class Bangiophyceae, Order Bangiales, Family Bangiaceae

Thin ruffled blades 15-30 cm tall growing in groups from small discoid holdfast; blade composed of a single layer of cells; gray-green to brownish purple. Resembles crumpled cellophane when dry. Sporophyte stage ("conchocelis") is a microscopic filament growing into mollusc shells.

Common, high intertidal zone. No other conspicuous alga occurs higher on the shore; protected & exposed outer coast.

Geo Range: Alaska to Baja
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