Volume I MARCH, 1911 No. 2 



EXPERIMENTS WITH PRIMULA SINENSIS. 



By R. p. GREGORY, M.A., 

 Fellow of St John's College, Cambridge ; University Lecturer in Botany. 



CONTENTS. 



Page 



istboduction 74 



Hbtebostylism 78 



Abnormal cases 84 



Leaf-Shape 86 



Palmate and Fern-leaf 87 



Ivy-leaf 87 



Habit 88 



Double Flowers 89 



Inheritance of ordinary double 91 



Chaeactebs of the "Eye" of the Floweb .... 91 



Large yellow eye x small eye 92 



White eye x small yeUow eye 94 



White eye x large yellow eye 94 



GoLOUB 94 



A. Stkh-Coloubs 95 



Inheritance of Stem-colonrs 96 



Partial Suppression of Colour 100 



B. Floweb-Coloubs 101 



Inheritance of Flower-colours 103 



Partial Suppression of Colour 105 



Inhibition 106 



Experimental results : (1) Pale colours . . 108 



(2) Full colours ... 109 



(3) Inhibition . . .115 



(4) Flakes . . . .121 



Gametic Cocpldig and Repulsiox 124 



Descbiption of Plates 130 



Jonm. of Gen. i 



