Page:Tree Crops; A Permanent Agriculture (1929).pdf/48

 FIG. 20. FIG. 21. Top. The trees in front of this hat, left, and behind the man, right (J. F. Jones), are hybrids (filbert x hazel) of same origin. (Photos J. Russell Smith.)—FIG. 22. Bottom. Bottom row, nuts of parent trees. Progeny above. Compare size of parents and offspring.