Botany Laboratory - Research

California Floristics | Botanical Nomenclature

Fred Hrusa's Crosswalk

This is an interface to the 2005 version of the nomenclatural crosswalk compiled by Dr. Fred Hrusa. The crosswalk is a database that accounts for the application of names of California plants. For the most part, The Jepson Manual of 1993 is the source of accepted names. The crosswalk is Dr. Hrusa's attempt to determine the Jepson name for names occurring in previous literature.

The crosswalk is neither exhaustive nor peer-reviewed (yet). It is made available by Dr. Hrusa with the hope that it will facilitate understanding of nomenclature of California plants.

Scientist:  Dr. Fred Hrusa (retired)

Index Californicae

Index Californicae is the 2018 update and expansion of Fred Hrusa’s Crosswalk, which is described.

Scientist:  Dr. Fred Hrusa (retired)

CDFA Rated Weeds Location Database

May be served here in the near future.

Scientist:  Dr. Fred Hrusa (retired)

Research Programs - Botany

Synopsis of some recent research projects