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Predominantly chaparral, there are isolated pockets of
southern oak woodland and some semi-riparian vegetation in this Sanctuary.
This area is unique botanically in that the coastal forms meet the
mountain forms here; thus the coastal Eriogonum fasciculatum meets and
intergrades with the mountain form, Eriogonum fasciculatum var. foliolosum.
Three localized shrubby species occur here, Salvia clevelandii, Cneoridium dumosum and
Ceanothus cyaneus. The
latter species is one of the four rare plants occurring in the area; the others
are Ribes canthariforme, Artemisia palmeri and Ophioglossum
The Cneoridium is one of the largest known specimens, forming a bush 2
meters (6 feet) tall and 2 meters (6 feet) across.
There is also a bigberry manzanita, Arctostaphylos glauca, 10 meters (35
feet) tall and with a slightly greater spread, which is believed to be the
largest extant specimen.
Various portions of the area have been burned on at
least four occasions, the last in 1961, forming a mosaic of different-aged
stands of chaparral. The pattern
clearly illustrates the processes of succession and restoration following such
disruptive changes as fire. Thus
Dicentra chrysantha was abundant after the fire but by 1968 none was observed.
A variety of lichens is found on the older shrubs and
There are numerous birds in the area, primarily passeriformes, and other chaparral fauna. The uncommon gray shrew, Notiosorex crawfordii, is found here.
Integrity: Educational, research, observational.
Ref: Gander, Frank. 1971. Silverwood Wildlife Sanctuary. Calif. Native Plants Soc. Newsletter 7 (3), pp. 9-10
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