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CA 12. Laguna de Santa Rosa. Acreage: 1000. 



O Location: Sonoma County; Sebastopol and Two Rock quadrangles; running 



^ from 4 miles SE to 6 miles N of Sebastopol. 



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(3 Description: A sluggish stream accompanied in its course by extensive fresh- 



water marshlands, representing a variety of habitats, including vernally wet 

 areas, permanent sedge bogs, springs, seepages, mudflats, and wet-ground 

 thickets. Contains a rich waterfowl life. Some unusual plants: Marsilea 

 mucronata, Alisma lanceolatum, Glyceria elata, Eleocharis pauciflora, Scirpus flu- 

 viatilis, Care.x Hassei, Elatine heterandra, Sium suave, Navarretia Bakeri, Navar- 

 retia cotulaefolia, Lycopus americanus. This may be the largest wetlands in the 

 California Coast Ranges. 



References: Rubtzoff, P. 1960-66. Notes on fresh-water marsh and aquatic 

 plants in California. Leafl. West Bot. 9:73-76, 166; 10:70, 72, 269, 307-309. 

 Notes on the genus Alisma, ibid. 10:92. 



Encroachments: Located in a farming region, it is being gradually eradicated as 

 a natural area as a result of heavy grazing, drainage, and ploughing. A danger of 

 subdivision exists. 



Ownership: Denner Brothers, Mr. Bolander (Timber Hill), Mr. Whitlatch, 

 Clover Milk Dairy, and others. 



Data source: Peter Rubtzoff, Department of Botany, California Academy of 

 Sciences, San Francisco, Calif. 941 18. 



Other knowledgeable persons: Mr. Bolander on Timber Hill. 



