Hickman Vernal Pools
Map SatelliteAmidst the undulating landscape on the eastern edge of the San Joaquin Valley is a series of vernal pools, including one which exceeds 175 hectares (425 acres) and is probably the largest in the valley .
In addition to supporting a number of common vernal pool species, including Eryngium vaseyi, at least three rare plants are found here. They include a spurge, Chamaesyce hooveri, and two grasses, Neostapfia colusana and Orcuttia pilosa. (See Vina Plains Vernal Pools)
During the migratory season a significant population of waterfowl utilizes the pools.
Integrity: Most of the area adjacent is grazed rangeland with a number of introduced grasses, though there are orchards and vineyards in the vicinity. On the site, corrals and a well are present and some introduced shade trees. Introduced weeds are becoming a problem.
Use: Private
Ref: Crampton, B. 1958. The Grass Genera Orcuttia and Neostapfia; A Study in Habitat and Morphological Specialization. Madrono 15 (4) pp. 97-128.
August 1975
Inventory of California Natural Areas
Revision © 2009 Steven Louis Hartman