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Distribution by County   5463    
Micropus californicus  Fisch. & C. A. Mey.
Cotton top, Micropus, Q tips, Slender cottonweed
Micropus californicus is an annual herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 39 Los Angeles: 41 Sacramento: 66 Sonoma: 65
Amador: 14 Madera: 30 San Benito: 159 Stanislaus: 14
Butte: 175 Marin: 107 San Bernardino: 9 Sutter: 10
Calaveras: 22 Mariposa: 68 San Diego: 98 Tehama: 144
Colusa: 34 Mendocino: 34 San Joaquin: 5 Trinity: 29
Contra Costa: 62 Merced: 19 San Luis Obispo: 100 Tulare: 40
Del Norte: 1 Monterey: 94 San Mateo: 70 Tuolumne: 153
El Dorado: 21 Napa: 65 Santa Barbara: 117 Ventura: 60
Fresno: 111 Nevada: 21 Santa Clara: 122 Yolo: 10
Glenn: 11 Orange: 28 Santa Cruz: 17 Yuba: 19
Humboldt: 27 Placer: 11 Shasta: 32
Kern: 36 Plumas: 5 Siskiyou: 11
Lake: 50 Riverside: 36 Solano: 20

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 04/12/2026).