“Tschermak has crossed _Graue Riesen_ with five races of _P. sativum_, and he finds that the form of the first hybrid seeds _follows the female parent_, so that if races of _P. sativum_ with round smooth seeds be crossed with _Graue Riesen_ (which has flattened, feebly wrinkled seeds) the hybrids will be round and smooth or flattened and wrinkled, as the _P. sativum_ or the _Graue Riesen_ is used as female parent[95]. There is here a more complex phenomenon than at first sight appears; because if the flowers of the first hybrid generation are self-fertilised, the resulting seeds of the second generation invariably resemble those of the _Graue Riesen_ in shape, although in colour they follow Mendel’s law of segregation!” [95] Correns found a similar result. From this account who would not infer that we have here some mystery which does not accord with the Mendelian principles? As a matter of fact the case is dominance in a perfectly obvious if distinct form. _Graue Riesen_, a large grey sugar-pea, the _pois sans parchemin géant_ of the French seedsmen, has full-yellow cotyledons and a highly coloured seed-coat of varying tints. In shape the seed is somewhat flattened with irregular slight indentations, lightly wrinkled if the term be preferred. Tschermak speaks of it in his first paper as “_Same flach, zusammengedrückt_”--a flat, compressed seed; in his second paper as “_flache, oft schwach gerunzelte Cotyledonen-form_,” or cotyledon-shape, flat, often feebly wrinkled, as Professor Weldon translates. First-crosses made from this variety, each with a different form of _P. sativum_, are stated on the authority of Tschermak’s five cases, to follow exclusively the maternal seed-shape. From “_schwach gerunzelte_,” “feebly wrinkled,” Professor Weldon easily passes to “wrinkled,” and tells us that according as a round _sativum_ or the _Graue Riesen_ is used as mother, the first-cross seeds “will be round and smooth or flattened and wrinkled.” As a matter of fact, however, the seeds of _Graue Riesen_ though _slightly_ wrinkled do not belong to the “wrinkled” class; but if the classification “wrinkled” and “round” is to be extended to such peas at all, they belong to the _round_. Mendel is careful to state that his _round_ class are “either spherical or roundish, the depressions on the surface, when there are any, always slight”; while the “wrinkled” class are “irregularly angular, deeply wrinkled[96].” [96] “_Entweder kugelrund oder rundlich, die Einsenkungen, wenn welche an der Oberfläche vorkommen, immer nur seicht, oder sie sind unregelmässig kantig, tief runzlig_ (_P. quadratum_).”