Distribution of Spirodela polyrhiza
Click on a square to display records from the Consortium of California Herbaria for that county.
- Butte
- Modoc
- San Bernardino
- Santa Cruz
- Sonoma
- San Mateo
- Mendocino
- Plumas
- Shasta
- Kern
- Marin
- Tuolumne
- Glenn
- Lassen
- Siskiyou
- Lake
- Humboldt
- Yolo
- San Francisco
- Merced
- Riverside
- Inyo
- Trinity
- Solano
- Mono
- Stanislaus
- Sierra