Home > Local Floras > Ronald W. Caspers Wilderness Park Vascular Plant Checklist
Ronald W. Caspers Wilderness Park Vascular Plant Checklist
Authors:
A project of the University of California Irvine Herbarium (IRVC). Contributors: Robert Allen, James Bailey, Rebecca E. Crowe, Emile Fiesler, Kyle Gunther, Fred Roberts, Michael G. Simpson, Ron Vanderhoff
Citation: Simpson M, Crowe R, Vanderhoff R (2022) Ronald W. Caspers Wilderness Park Vascular Plant List. In: CA Consortium of Herbaria 2. https://www.cch2.org/portal/checklists/checklist.php?clid=82&pid=5. Accessed [Date]
Abstract: This checklist, a project of the University of California Irvine Herbarium (IRVC), is a tabulation of the vascular plants of the Ronald W. Caspers Wilderness Park, with cited documentation from herbarium vouchers, iNaturalist observations, and CalFlora observations. Student contributors include: Elora Camacho, Cem Cizem, Maddy Letterman, Megan Peukert, Louis Truong.
We list plants as: NATIVE: thought to occur naturally in the area, not human introduced; NATURALIZED: not native but successfully reproducing and spreading in native habitats without human intervention; PERSISTING FROM CULTIVATION: originally planted/cultivated, but no longer maintained; not reproducing or escaping into native habitats; WAIF: not native to the area, having been (unintentionally) human introduced, escaped from cultivation, or naturally dispersed into a natural habitat, but currently not or sparingly reproducing/spreading past initial generation or establishment. Some potential to become naturalized.
We consider documentation to primarily be vouchered herbarium specimens. These are cited and linked to specimens databased through the CCH2: Consortium of California Herbaria 2. We use the Jepson eFlora as the primary source of our taxonomy, but in some cases use the primary literature from more recent studies. A compilation of lists from various sources, documented and not documented, is seen HERE (prepared by Emile Feisler). We also cite "research grade" iNaturalist observations as a secondary source of valid documention. These are derived from the Plants of Ronald W. Caspers Wilderness Park iNaturalist Project. This MAP shows the Park boundaries (in green) along with grid squares for a future Orange County Plant Atlas Project.
To see a map of the most recent 5,000 records from all sources (CCH2, iNaturalist and Calflora), click HERE. Clicking the point will display the taxon name and the option to view the record details.
To date, the following taxa at Caspers have a listing on the CNPS Inventory of Rare and Endangered Plants of California: Allium marvinii: 1B.2 G1 S1 Brodiaea filifolia: 1B.1 FT CE G2 S2 Calochortus catalinae: 4.2 G3G4 S3S4 Calochortus weedii var. intermedius: 1B.2 G3G4T2 S3 Clinopodium chandleri: 1B.2 G3 S2 Convolvulus simulans: 4.2 G4 S4 Deinandra paniculata: 4.2 G4 S4 Dudleya multicaulis: 1B.2 G2 S2 Dudleya viscida: 1B.2 G2 S2 Harpagonella palmeri: 4.2 G4 S3 Holocarpha virgata subsp. elongata 4.2 G5T3 S3 Hordeum intercedens: 3.2 G3G4 S3S4 Lepidium virginicum var. robinsonii: 4.3 G5T3 S3 Leptosiphon grandiflora 4.2 G3G4 S3S4 Lilium humboldtii subsp. ocellatum: 4.2 G4T4? S4? Microseris douglasii subsp. platycarpa 4.2 G4T4 S4 Monardella hypoleuca subsp. intermedia: 1B.3 G4T2? S2? Quercus engelmannii: 4.2 G3 S3 Polygala cornuta var. fishiae 4.3 G5T4 S4 Pseudognaphalium lcocephalum 2B.2 G4 S2 Romneya coulteri: 4.2 G4 S4
Please contact Michael Simpson, Rebecca Crowe, or Ron Vanderhoff for more information on this Checklist and Kyle Gunther for more information on the Caspers iNaturalist Project. We encourage readers to also visit our Whiting Ranch Wilderness Park Vascular Plant Checklist. Notes: To access documentation details, click individual herbarium vouchers, iNaturalists records or Calflora records (for iNat try refreshing the page to see a close-up map). Click the Voucher Mapping icons below the menu to the right to see the current, cumulative distribution and collection details of georeferenced herbarium vouchers in the Park.
Families: 94
Genera: 358
Species: 592
Total Taxa: 604
NATIVE, CalFlora Observations; Michael G. Simpson 4728 [SDSU], Fred M. Roberts 9132 [SDSU], Michael G. Simpson 4729 [SDSU], Michael G. Simpson 4730 [SBBG], more...Michael G. Simpson 4726 [SBBG], Simpson, Michael G. 4727 [SBBG], Ron Vanderhoff 783 [IRVC], Fred M. Roberts 9132 [IRVC], ...less
Probable WAIF (native to Eurasia) Note: a single plant near the entrance kiosk in May 2022 could not be relocated in Feb 2023. Prefers cooler and more Northerly climates., iNat Observations
NATURALIZED (native to southern Europe), Note: only Polycarpon tetraphyllum var. tetraphyllum treated as occurring in CA in the Jepson Manual and in FNA. iNat Observations; CalFlora Observations
NATIVE, Note: The subspecies of Calystegia macrostegia are not recognized in a recent thesis, Namoff, S. M. 2017. Hybridization processes, biogeographic patterns and taxonomic rearrangements within Calystegia (Convolvulaceae). PhD. Claremont Graduate University, Claremont, California, USA, which we follow here. iNat Observations; CalFlora Observations; Brummitt, R. K. 19994 [CAS], R. K. Brummitt 19994 [RSA], Mellifera R. Letterman 14 [IRVC], Michael G. Simpson 4582 [IRVC], more...R.K. Brummitt 19994 [SD], R. K. Brummitt 19994 [UCJEPS], ...less
PERSISTING FROM CULTIVATION (native to Eastern Mediterranean)
NATURALIZED (native to Mediterranean Europe, possibly Eurasia), Note: plants vegetative, not determined to subtaxa, CalFlora Observation
NATIVE to California, but out of range, probable WAIF in the Park, needing verification; Fred Zaebst s.n. [UCR]
PERSISTING FROM CULTIVATION (native to the Chihuahuan desert of Mexico), iNat Observations
NATIVE, Note: A single observation that could be from a seeding or restoration. More details and verification needed. iNat Observations
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