The California Botanical Society was founded by Willis Linn Jepson in 1913, since when it has advanced the knowledge of botanical sciences in the Western United States
The society services are: the journal Madroño, published since 1916; annual banquets in various California locations along with educational lectures; research support on green plants of Baja California, (enabled by the Annetta Carter Memorial Fund); graduate student support (together with the annual banquet); and community discussions with professional botanists.
| Italic Title: | no |
| Madroño | |
| Cover: | Madroño cover.jpg |
| Discipline: | Botany |
| Abbreviation: | Madroño |
| Language: | English, Spanish |
| Editor: | Matt Ritter |
| Publisher: | California Botanical Society |
| Country: | United States |
| History: | 1916–present |
| Frequency: | Quarterly |
| Website: | http://calbotsoc.org/madrono/ |
| Issn: | 0024-9637 |
| Oclc: | 213802384 |
Madroño is the quarterly peer-reviewed scientific journal of the Society. It was established in 1916 and focuses on botany in the western part of North America. Articles are published in English or Spanish. The current editor is Matt Ritter (California Polytechnic State University).