Native seedling selection made from Wash Orrell farm, Clinton County, Ill., by Wm. W. and J.W. Lawrence, Fayette County, Ill., in the early 1940s. Selected by A.S. Colby and J.C. McDaniel, Univ. of Illinois, and tested as Illinois 1-19A. Released in 1957, named in honor of AS. Colby. Nut: oblong, with acute apex and base; round in cross section; 66 nuts/lb, 44% kernel; kernels golden in color, with wide dorsal grooves and deep basal cleft. Protogynous, with mid to late-season pollen shed and early pistillate receptivity. Medium precocity and prolificacy, with regular production. Matures in 160 day growing season; grown as far north as Niagara on Lake, Ontario, Canada. Used as a seedstock in Kansas and north. Recommended (1990) for planting in Arizona, Kansas, Kentucky, Oklahoma, and Tennessee. Origin: Tree: Fruit:
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