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Oakmead Herbarium and Collections


Castilleja densiflora ssp. densiflora
Castilleja densiflora ssp. densiflora

Honoring Toni Corelli for 31 years of service to Jasper Ridge

Vascular Plants | Bryophytes | Lichens (.xlsx)
Plant photo favorites   | Virtual tour with our photo archive
Fading wildflowers? Dissapearances and declines

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 900 different vascular plants and 77 bryophytes. There are, however, other and perhaps more significant measures of the richness of the Preserve's flora . . . read more

Today the Oakmead Herbarium and Collections of Jasper Ridge Biological Preserve (JROH) has 6,000+ vouchers of all bryophytes and 800+ vascular plants representing over 10% of the 7,600 terminal taxa (species, subspecies, varieties) native or naturalized in California.* Specimen records are in the Consortium of California Herbaria



Maps & Vegetation Surveys

Rare Plants and CNPS Ranking


* While scientific names follow TJM2 and supplements, we also include plants and/or names not treated therein. Following the Marin Flora, 2nd ed, 2007: “We include here as naturalized species those that are established and have a true competitive status without cultivation whether the plant is aggressively spreading or seems only passively and locally established. . . . Experience has shown that the waifs of today may become the weeds of tomorrow". We also include named hybrids not given taxonomic status in TJM2, e.g., Elymus x hanseniiQuercus x jolonensis.

Photographs  for most plants 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 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. Jasper Ridge grassland-related research is surveyed in Stromberg, M. et al. (2007) California Grasslands Ecology and Management and Lunch (2009) Primary production at Jasper Ridge Biological Preserve