Flora of Grapevine Canyon Area, Anza-Borrego Desert State Park
Introduction The following map shows the Grapevine Canyon area:
Voucher locations are plotted with blue diamonds. Our single survey location is plotted as a heavy blue line, which includes a section of Grapevine Canyon Road that is obscured by voucher symbols. The voucher coordinate search box is outlined in green (see below). (See also larger-scale map to locate Grapevine Canyon within Anza-Borrego Desert State Park.)
This checklist is compiled from two sources. First, from vouchers taken in the Grapevine Canyon / San Felipe River area north of SR78, east of the mouth of Sentenac Canyon, and west of the Tamarisk Grove Campground. Second, from a survey done on 15 November 2011, and another on 15 April 2012, of a loop through lower Bitter Spring Canyon, the drainage to the northwest, and along Grapevine Canyon Road.
The vouchers come from a search on 13 November 2011 of the Consortium of California Herbaria.
The Consortium records were searched for vouchers with coordinates between 33.13 and 33.16° N. Latitude, and -116.46 and -116.37 E. Longitude (the rectangle outlined in green on the map above), and for all vouchers with the locality Grapevine Canyon. (A larger coordinate search box would have returned many vouchers not in Grapevine Canyon.)
The detailed localities of those vouchers were examined and those not actually in the target area were eliminated.
In addition, four vouchers from Marcus E. Jones, from 21 January 1926, georeferenced here were eliminated, since they were of species from Imperial County unlikely to be present in this area. His vouchers have the locality of Yaqui Well, but were said to be from Imperial County. The species rejected were Camissonia claviformis ssp. yumae, Chorizanthe corrugata and Ephedra trifurca. In addition, he had the only voucher of Camissonia chamaenerioides. Although this species could be found here, that voucher also was said to be from Imperial County.
506 vouchers remained of 237 taxa. Larry Hendrickson was far and away the dominant collector here, responsible for 42% of all the vouchers from this area. Groups with 15 or more vouchers are listed in the following table:
# Vouchers Collector 96 Larry Hendrickson, Cathleen Weigand, Brian Woodward 49 Jeannie Gregory, John Gregory 49 Larry Hendrickson 48 Larry Hendrickson, Margaret Mulligan, Cathleen Weigand 47 Marcus E. Jones 22 Alice Eastwood 23 W. L. Jepson 20 Frank F. Gander 15 Larry Hendrickson, Chris Peregrin The field survey on 15 November 2011 was done by Tom Chester, James Dillane, Mike Crouse, Kate Harper, Dave Stith and Pam Pallette. We found 112 taxa, despite missing a lot of annuals and perennials not apparent at this time of year. Of those 112 taxa, 87 were on the grapevine canyon voucher list, 19 of these taxa were not, and 6 observed species need further determination when they are in an identifiable state.
The field survey on 15 April 2012 was done by Tom Chester, Kate Harper, RT and Shaun Hawke. We added a whopping 68 taxa to the list from 15 November 2011!
The Grapevine Canyon checklist thus contains 281 taxa, 172 from our two field surveys; an additional 108 from vouchers; and one possible additional species from our surveys. The checklist below contains an additional 25 taxa observed in Mine Wash to improve the completeness of this checklist for use in the field in future surveys, for a total of 306 taxa.
Checklist for Grapevine Canyon Area The column BC is the minimum number of plants observed in our field surveys of the Bitter Creek Canyon area, up to a maximum of 99 plants.
Version for printing, without other text on this page: html (8 pages) or pdf Clickbook booklet (2 double-sided pages). (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/)
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Copyright © 2011-2016 by Tom Chester, Kate Harper, James Dillane, Mike Crouse, Dave Stith, and RT and Shaun Hawke.
Permission is freely granted to reproduce any or all of this page as long as credit is given to me at this source:
http://tchester.org/sd/plants/floras/grapevine_canyon.html
Comments and feedback: Tom Chester
Last update: 4 March 2016