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Map Satellite Gallagher's Canyon and the immediately adjacent areas support a number of island endemics. Along the bluffs at the mouth of the canyon are Dudleya hassei, Phacelia lyonii, Galium catalinense and Hemizonia clementina. In the west fork of the canyon is one of the best stands of the uncommon island oak, Quercus tomentella. The groves form a discontinuous forest from about 60 meters (200 feet) to 395 meters (1,300 feet). In these groves some of the trees reach a height of 25 meters (80 feet) and have a dbh of 0.6 meter (2 feet). There are some groves in the east fork. Near the top are stands of Catalina ironwood, Lyonothamnus floribundus ssp. floribundus. At the top, in the area of the Haypress and Wrigley reservoirs, is a well-developed chaparral community with Solanum wallacei, Eriogonum giganteum ssp. giganteum and Arctostaphylos catalinae, among others. See Avalon Canyon, Ben Weston Beach, and Bird and Indian Rocks. Integrity: There are some buildings at the mouth of the canyon and two reservoirs on the terraces above. February 1977
Inventory of California Natural Areas
Revision © 2008 Steven Louis Hartman
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