Flora of Southeast Santa Rosa Mountains
Introduction
This checklist gives the flora of the portion of the Santa Rosa Mountains that are in Anza-Borrego Desert State Park in the extreme northeast corner of in San Diego County. It consists of voucher records from the Consortium of California Herbaria, and the results of a number of field surveys here.
Vouchers from the Consortium of California Herbaria were searched on 18 December 2011.
The field surveys were done in the following five areas: Villager Peak Trail, Palo Verde Canyon, Smoke Tree Canyon, the Palm Wash / Calcite Mine Area, and the Extreme Northeast Corner of San Diego County.
The general location of the southeast Santa Rosa Mountains is delineated by the red rectangle in the following map:
The following voucher information is from a search on 29 December 2007 of the Consortium of California Herbaria and the San Diego Plant Atlas and Herbarium records. We have not yet updated the voucher information from the 2011 search.
The final voucher database consisted of 284 vouchers. 162 of these are from the San Diego Plant Atlas; 119 are from the San Diego Herbarium; and only 3 are from elsewhere.
The dominant collector in the final voucher database was Larry Hendrickson, 82 vouchers; other collectors with a significant number of vouchers were Bill Sullivan, 27 vouchers; and Joe Barth, 19 vouchers.
There were 151 total unique taxa from the 284 vouchers.
The following field survey information was from the survey results as of 29 December 2007, and has not been updated from more recent surveys. The five field surveys found 113 total unique taxa from 254 individual species records. Of the 113 taxa, 30 were taxa not found in the voucher records.
The total checklist below contains 181 taxa as of 29 December 2007; 183 taxa as of 16 January 2016.
The size of this checklist area is roughly a total of 72 square miles. An area of this size in most of the rest of San Diego County would have roughly 500 native species, whereas this area has just 183 so far recorded. There is little doubt that most of this area is unsurveyed, and future surveys will increase the number of species significantly.
For comparison, the Flora of the Granite Mountains in eastern San Bernardino County has 460 native taxa in an area of 107 square miles, about 85% of the number of taxa expected from an area in the CA-FP. Using that same factor of 0.85, one would expect 415 native taxa in this flora, 2.7 times more than is listed below. That is probably an upper limit to the number of taxa expected here, since this area contains only one aspect of the Santa Rosa Mountain Range, lacking the high-elevation north-facing slope.
Checklist for Southeast Santa Rosa Mountains
See:
- Notes on the Scientific Names Used At This Site and
- Information about the order in which the species are presented, and the links from the Scientific Name and Common Name.
An asterisk before the common name indicates a non-native species.
The column #V gives the number of vouchers found in this area, as detailed above.
The column #Pls gives the minimum number of plants observed in the sum of all field surveys, up to a maximum number of 99.
Version for printing, without lines and other text on this page: html (5 pages) or pdf Clickbook booklet (1 double-sided page). (See printing instructions for an explanation of these options)
Voucher data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
We thank Keir Morse, Michelle Tollett, Jim Roberts, Charles Wolfinger, Bill Bulger, Shaun Hawke, Dave Stith, William Schlegel, Erik Blume, Aaron Schusteff, Bob Case, and Kate Shapiro for helping with at least part of one of the surveys in this area.