Eriogonum kennedyi var. austromontanum
|Kennedy's Southern Mountain Buckwheat, Southern Mountain Buckwheat, Southern Mountain Wild-buckwheat|
|Munz & Johnston|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Cincinnati Zoo & Botanical Garden
The conservation of Eriogonum kennedyi var. austromontanum is fully sponsored.
Naomi Fraga contributed to this Plant Profile.
Eriogonum kennedyi var. austromontanum (Southern mountain buckwheat) is a woody-based cushion-like perennial in the buckwheat family (Polygonaceae) that flowers from July to September (USDA FS 2007a). This species is endemic to a unique habitat called pebble plains (also known as pavement plains). Pebble plain habitat is of limited distribution (occurring only in the San Bernardino Mountains) and supports a biologically rich but highly threatened plant community that consists of small cushion forming plants, minute annuals, grasses, and succulents. E. kennedyi var. austromontanum was listed as threatened by the federal government in 1998.
Distribution & Occurrence
Eriogonum kennedyi var. austromontanum occurs on pebble plains and is often associated with Arenaria ursina (also a pebble plain endemic). This species prefers rocky sites within pebble plains and occurs at elevations of 6,720-9,475 ft (2,050-2,890 m) (USDA FS 2007a, USFWS 1998). Pebble plains are open treeless areas that consist of clay soil (up to 53%) mixed with a pavement of quartzite pebbles and gravel that are pushed to the surface through frost action (USDA FS 2007a). The combination of clay soil, frost heaving, extreme temperature fluctuations, high light intensity, and desiccating winds is thought to prevent the establishment of tree species on pebble plains (USDA FS 2007b).
|The California Natural Diversity database reports 22 occurrences of E. kennedyi var. austromontanum, 18 of these are on the San Bernardino National Forest (CNDDB 2007).|
Conservation, Ecology & Research
Implement strategies within the Pebble Plain Habitat Management Guide to the greatest extent practicable.
Utilize the habitat suitability criteria and detection protocols developed for this taxon and apply to surveys at the project level.
Survey all new occurrences of E. kennedyi var. austromontanum and any occurrences that have not been visited in the past ten years, and record occurrence status, habitat condition, and threats.
Collect a herbarium voucher specimen of E. kennedyi var. austromontanum to document new occurrences or to verify a historical occurrence if the occurrence is not known to have been documented in at least ten years prior.
The Jepson manual: higher plants of California. In: Hickman, J. C., editor. University of California Press. p 1400.