Vegetative morphology:

Often growing on large, flat rocks in the low intertidal near upper limit of the Laminaria band in semi-exposed areas subject to scour and/or burial by sand or other sediment. The dwarf phase has been found on the clean inner surface of empty Mytilus californianus shells.

Bibliographic Details
Main Author: Godthaab Greenland
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.624.2694
http://www.seaweedsofalaska.com/documents/urospora_wormskioldii.pdf
Description
Summary:Often growing on large, flat rocks in the low intertidal near upper limit of the Laminaria band in semi-exposed areas subject to scour and/or burial by sand or other sediment. The dwarf phase has been found on the clean inner surface of empty Mytilus californianus shells.