Oakmead Herbarium and Collections

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Castilleja densiflora ssp. densiflora

Vascular Plant List
Vegetation Map | Insolation Map | Geology Map
CNPS Vegetation Rapid Assessments

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The earliest known plant collections from the Jasper Ridge area are from 1867. Originally part of Volney Rattan's herbarium, the specimen sheets are conserved in the Preserve's herbarium and have the location Searsville. Over the intervening 145 years numerous workers have cumulatively reported more than 800 different vascular plants.

Today the Oakmead Herbarium and Collections of Jasper Ridge Biological Preserve (JROH) has over 5,400 vouchers of 794 vascular plants representing 10% of the 7,600 terminal taxa (species, subspecies, varieties) currently recognized in California.* Specimen records are in the Consortium of California Herbaria. The herbarium also has representative collections of Preserve bryoflora and lichens.

Plant lists

•  Vascular Plant List 
  •  Documented hybrids not given taxonomic status in TJM2
  •  Documented waifs or agricultural weeds
  •  Undocumented reports (not included in the main plant list)
  •  Rejected reports and erroneous inclusions
• Phylogentic guide to Jasper Ridge Vascular Plant Families
• Plants of Searsville Lake and Wetlands South of Searsville Lake, Preliminary List 2012 [Excel version]
• Jasper Ridge Biological Preserve Serpentine Flora, 2007–
• JRBP Poales E-Flora
• C4 species at JRBP
• Jasper Ridge Global Change Experiment Plant List 2012
• Plants in the local flora with nitrogen-fixing symbionts
• Preliminary Bryophyte Checklist 11/29/2011
• Field characters of some bryophytes
• The Mosses of Stanford University and Vicinity

Lichens

• Preliminary Lichen Checklist (Excel)
• Doel, J. 1996. Key to the commoner lichens on Jasper Ridge.
• Tucker, S. 2014. Catalog of Lichens, Lichenicoles and Allied Fungi in California. Includes links to photographs
• Photos of some Jasper Ridge lichens

News

• Floristic Statistics
• Additions to the vascular flora 2012-
• Weed Alert
• Herbarium weeding projects
• Arrival dates of some naturalized grasses
• Jasper Ridge place names

Notes

* 794 minus 33 waifs and hybrids not given taxonomic status in TJM2 = 761 vascular plant taxa for JRBP and ~7,600 for California.

Photographs for most plants including location information are linked to the Vascular Plant List entries. In addition to specimen labels and maps on many JROH specimen sheets, location, flowering time, and abundance records may also be found in the Field Observations Database and the JRBP Poales E-Flora.

References relevant to the floristics of Jasper Ridge Biological Preserve: The history of the herbarium is described by Thomas (1992) The Jasper Ridge Biological Preserve Teaching and Reference Collection of Vascular Plants and Jewett (2005) Documenting Plant Diversity: Jasper Ridge's Herbarium. For Stanford's rich botany heritage see Timby (1998) The Dudley Herbarium: its origin, fate, and legacy at Stanford. 

Rare Plants

Scientific Name and  CNPS Ranking

• Allium peninsulare Greene var. franciscanum McNeal & Ownbey [Rank 1B.2]
• Arabis blepharophylla Hook. & Arn. [Rank  4.3]
• Dirca occidentalis A. Gray [Rank 1B.2]
• Eryngium jepsonii J.M. Coult. & Rose [Rank 1B.2]
• Lessingia hololeuca Greene [Rank  3]
• Malacothamnus fasciculatus (Torr. & A. Gray) Greene [Rank 1B.2]
• Monolopia gracilens A. Gray [Rank 1B.2]
• Piperia michaelii (Greene) Rydb. [Rank  4.2]
• Plagiobothrys chorisianus (Cham.) I.M. Johnst. var. hickmanii (Greene) I.M. Johnst. [Rank  4.2]

Herbarium staff in 2016: Teri Barry, Carl Cheney, Nona Chiariello, Toni Corelli, Alice Cummings, Paul Heiple, Ann Lambrecht, John Rawlings, Rebecca Reynolds, Diane Renshaw