The Marin county chapter of the California Native Plant Society has published a list of all plants found in Marin County at MARIN TOTAL PLANTS (All of the species known in Marin County).
The Marin CNPS also has Marin County lists of Ferns, Shrubs, Trees as well as lists for many wildflower hotspots in Marin at Marin County Plant Lists – CNPS Marin.
Natural History Wanderings 
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