The CDFW Vegetation Classification and Mapping Program (VegCAMP) has recently updated their list of Natural Communities for California.
Updated November 8, 2019, the list includes vegetation Alliances, Associations, Special Stands, and their respective Global and State rarity ranks. PDF and spreadsheet copies of the full list, sensitive communities, and recent changes - along with information about the legacy Natural Community Element Occurrences still found in CNDDB - can be found on the VegCAMP Natural Communities web page.