. Miscellaneous papers on oenothera. Oenothera; Primroses. 45° BOTANICAL GAZETTE [DECEMBER that it gives no reversions to f. typica. All of the aberrant plants in the cultures, both from self-pollination and from pollination with f. typica, are mutations belonging to the characteristic group. As in the case of mut. formosa, most of the secondary mutations were mut. setacea. The small culture of f. typicaXmut. albicans emphasizes the fact that the composition of the culture is conditioned by the female gamete. As in the case of the analogous cross f. typicaXmut. formosa, the progeny is just wha
. Miscellaneous papers on oenothera. Oenothera; Primroses. 45° BOTANICAL GAZETTE [DECEMBER that it gives no reversions to f. typica. All of the aberrant plants in the cultures, both from self-pollination and from pollination with f. typica, are mutations belonging to the characteristic group. As in the case of mut. formosa, most of the secondary mutations were mut. setacea. The small culture of f. typicaXmut. albicans emphasizes the fact that the composition of the culture is conditioned by the female gamete. As in the case of the analogous cross f. typicaXmut. formosa, the progeny is just what we should expect from self-pollination of the typica parent. Mut. revoluta.—Only one small progeny was obtained from this nearly sterile muta- tion. It showed that the form reproduces itself except for throwing other mutations of the characteristic group. None of the crosses made with mut. revoluta were successful, but there can be little doubt, from collateral evidence, that mut. revoluta, as well as mut. albi- cans, follows the same type of inheritance as mut. formosa. Mut. setacea.—So far as can be determined, this form comes entirely true from seed, and represents the most extreme modification which can take place in the direction followed by the group of characteristic mutations. Although the crosses with f. typica have so far not been successful, it is probable that this extreme reduction phase would also be dominant when introduced into the cross as the female Fig. 12,—Mut. formosa: 2 rosettes, Lexington E-5-206 and 207, from the Fj progeny of £. typica; both are shown in fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Vries, Hugo de, 1848-1935. Berlin, Leipzig, etc. , etc.
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