. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . 62.—Three walnuts: at left Japanese walnut, at right English walnut,and in middle a hybrid of these two. (From photograph by Burbank.) New Creations7 catalogue of 1894, of the berry experimenta-tion is a reproduction of a photograph showing a sample pileof brush 12 feet wide, 14 feet high, and 22 feet long, containing65,000 two- and three-year old seedling berry bushes (40,000Blackberry X Raspberry hybrids and 25,000 Shaffer X Gregghybrids), all dug up wi
. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . 62.—Three walnuts: at left Japanese walnut, at right English walnut,and in middle a hybrid of these two. (From photograph by Burbank.) New Creations7 catalogue of 1894, of the berry experimenta-tion is a reproduction of a photograph showing a sample pileof brush 12 feet wide, 14 feet high, and 22 feet long, containing65,000 two- and three-year old seedling berry bushes (40,000Blackberry X Raspberry hybrids and 25,000 Shaffer X Gregghybrids), all dug up with their crop of ripening Thephotograph is introduced to give the reader some idea of thewrork necessary to produce a satisfactory new race of the 40,000 Blackberry-Raspberry hybrids of this kind1 Paradox is the only one now in existence. From the other25,000 hybrids two dozen bushes were reserved for furthertrial. ARTIFICIAL SELECTION 97 Leaving Burbanks other fruit and berry creations un-noticed, we may refer to his curious cross-bred walnut results(Fig. 63), the most astonishing of which is a hybrid between. FIG. 63.—At left, leaf of English walnut, Jnglans regia; at right California blackwalnut, Juglans californica; and in the middle a leaf of the hybrid Paradox, firstgeneration. (From photograph by Burbank.) Juglans Californica (staminate parent) and J. nigra (pistillateparent), which grows with an amazing vigor and rapidity, thetrees increasing in size at least twice as fast as the combinedgrowth of both parents, and the clean-cut, glossy, bright green 98 EVOLUTION AND ANIMAL LIFE leaves, from two to three feet long, having a sweet odor like thatof apples. This hybrid produces no nuts, but curiously enoughthe result, of the reverse hybridization (i. e., pollen from nigra on
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