Origin: in Chico, Calif., by U.S. Dept. of Agriculture. Plant Introd. Sta. Introd. and named in 1954 by Moses Adams, Salem, Ore., who received the tree from Chico in 1927; this tree is a seedling of P.I. 18256. Parentage unknown; seed of P.I. 18256 collected by Frank Meyer of the U.S. Dept. of Agriculture in 1906 in mountains north of Beijing, China. Nut: large; round; shell thin but rather hard, with a grayish cast; kernel quality excellent, dark in color. Tree: more hardy than standard varieties; promising as a source of vigorous rootstocks. Fruit:
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