J20161110-0049—Eriogonum nudum var psychicola—RPBG

Eriogonum nudum var. psychicola—Antioch Dunes buckwheat. Included in the CNPS Inventory of Rare and Endangered Plants on list 1B.1 (rare, threatened, or endangered in CA and elsewhere). It is also listed as critically imperiled by the State of California. Antioch Dunes buckwheat is known from one population in Antioch Dunes National Wildlife Refuge. The extremely rare buckwheat is the sole host plant for the even rarer Lange's metalmark butterfly. Two works available on the internet make for interesting reading: James L. Reveal's publication of the variety "A New Variety of Eriogonum nudum (Polygonaceae) from California" www.biodiversitylibrary.org/item/47140#page/51/mode/1up and The Urban Wildlands Group "Captive Rearing of Lange's Metalmark Butterfly, 2010-2011" www.urbanwildlands.org/Resources/LMBFinalreport2010_2011.pdf. The plant photographed is at Regional Parks Botanic Garden located in Tilden Regional Park near Berkeley, CA.

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