Acrosorium ciliolatum (Harvey) Kylin
Also known as Acrosorium uncinatum sensu Kylin and Acrosorium venulosum (Zanardini) Kylin
Description: Flattened, membranous, deep red fronds, 30-150(-200) mm long. Frond deeply divided into linear-lanceolate, irregularly branched segments, often terminating in hooks. Margins toothed, often ± proliferous. Frond traversed by network of microscopic veins, macroscopic veins absent.
Habitat: On rocks and epiphytic, lower intertidal and subtidal, widely distributed, occasional.
Similar species: Frequently confused with Cryptopleura ramosa, a very variable spcies that occurs in a similar range of habitats. Acrosorium is generally more frequent subtidally in clear, clean water, and has scythe-like recurved apices that do not form a complete circle.
Photographs © M.D. Guiry