. Journal of genetics. plants, all with slight fimbriation of edges of petals, 8 with 1 or more 6-petalled flowers : petals large, selfed 1 plant 1908 Fi 5A1 11 plants: flowers large, of good substance; j)etals meeting or over- lapping. Flower slow in opening; slight fimbriation of edgesof many petals= Giant )Vhite Queen Star, see Plate XI, fig. 1909 Fi, 5A 1/1 3 plants all true to Giant form and habit hAlft 7 ,, „ ,, selfed 1910 Fg 5A Ijijl 8 plants all true to Giant form and habit 5J 1/2/8 1 plant 5A1/2/9 2 plants ,, ,, ,, selfed 1911 F7 5A 9 6 plants all true to Giant form and liab
. Journal of genetics. plants, all with slight fimbriation of edges of petals, 8 with 1 or more 6-petalled flowers : petals large, selfed 1 plant 1908 Fi 5A1 11 plants: flowers large, of good substance; j)etals meeting or over- lapping. Flower slow in opening; slight fimbriation of edgesof many petals= Giant )Vhite Queen Star, see Plate XI, fig. 1909 Fi, 5A 1/1 3 plants all true to Giant form and habit hAlft 7 ,, „ ,, selfed 1910 Fg 5A Ijijl 8 plants all true to Giant form and habit 5J 1/2/8 1 plant 5A1/2/9 2 plants ,, ,, ,, selfed 1911 F7 5A 9 6 plants all true to Giant form and liabit selfed 10 1 plant 1912 Fg G. W. Q. S. 30 plants all trae to Giant form and habit these mutants is illustrated in Plate XI, figs. 1, 2—and a com-parison of the giant and normal forms shows how markedly they differthe one from the other. The differences between the two forms are notconfined to the flowers, though they are most patent in the petals(c/. Fig. 1). Giant White Queen Star, the origin of which is now. Fig. 1. Corolla of Normal and of Giant White Queen of Gen. it 12 168 Gigantism in Primula sinensis uuder consideration, is a more massive plant, with slower growth thanthat of the ordinary form of White Queen Star from which it corolla of the Giant is about half as large again as the corollaof the normal form and adjacent petals of the former either meetor overlap instead of leaving a narrow space between them as isthe case with the normal plant. The overlapping of the contiguous petals is a characteristic ofgiants both of the sinensis and stellata type of flower, and is due tothe fact that the oblate petals are much broader than arethe more ovate petals of varieties of normal stature. In one respectonly does Giant White Queen Star differ from most giants. It hasretained the tiering habit of the typical stellata form of inflorescence. This example of a giant form characterised by a typically stellatahabit of inflorescence is not un
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