. Yearbook of the United States Department of Agriculture . Seedlings of Citrus Hybrids, Showing Relative Vigor of True and False Hybrids. [No. 780, a false hybrid (trifoliate x sweet orange): No. 772, a true intermediate hybrid (trifoliate Xsweet orange), with large trifoliolate leaves; No. 845, a cross of two ordinary orange seedlings of same age.] Yearbook U. S. Dept. of Agriculture,

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsugarbeetunitedstate