Heterosiphonia japonica Yendo
Also known as H. asymmetrica Hollenberg, H. densiuscula Kylin
Description: Bushy, deep red-brown fronds, to 600 mm long, arising from a basal disc. Axis not always obvious, cylindrical, diminishing in diam. from base to apex. Branching repeatedly distichously pinnate, branches spreading , alternate. Ultimate ramuli bifid or multifid, monosiphonous, sharply pointed.
Habitat: On sand-covered rocks, lower intertidal
Distribution: currently
known only from New Quay, Co. Clare in Ireland (above). Introduced into Britain, Norway, Sweden, the Netherlands, France, Spain, and Italy, probably as a result of the transfer of oyster spat. Originally from Pacific where it occurs in Japan, China and Korea, and from Alaska to California.
seaweed GUIDE book
Seaweeds -
A colour identification guide to seaweeds of the World. By Wolfram Braune & Michael Guiry. In English. More information.
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