Kayberries : "the cultivated berry with the wild blackberry flavor." - Kennicott, R. W.,; Henry G. Gilbert Nursery; Seed Trade Catalog Collection.; Kennicott Ranch. (Chehalis, Wash, R.W. Kennicott, [1949?], 1949)
https://www.biodiversitylibrary.org/bibliography/188661
Keywords: Berries|Catalogs|Chehalis|Nursery stock|Seedlings|Washington (State)|