TABLE OF CONTENTS. 



Page. 



Introduction and Historical Review of Literature 3 



The Problem in Coleus 12 



Method of Recording Results 13 



Method of Handling Cultures 16 



General Survey of the Variations 16 



Constancy of the Various Patterns 20 



Plants with yellow-red blotched pattern 21 



Plants with green-yellow-red blotched pattern 21 



Plants with color pattern green-yellow spotted-red blotched and with uniformly entire 



leaves 24 



Plants with laciniate leaves 26 



Plants with green-red blotched pattern 29 



Plants with pattern yellow-green-red blotched 31 



Plants of color pattern green-yelloiv-solid red 32 



Plants with green-solid red pattern 32 



Plants with green-yelloiv-solid red upper center 33 



Plants with pattern yellow-green-solid red 34 



Plants with pattern green-yelloio 34 



Plants with pattern green and pattern green-yellow spotted 34 



Plants with pattern yellow-green 35 



Range of the Variations 37 



Frequency of the Bud Variations 39 



A. Changes involving yellow and green 39 



I. Increase of yellow and decrease of green. 

 II. Decrease of yellow and increase of green. 

 III. Reversal of the relative positions of green and yellow. 



B. Changes involving the epidermal red 40 



I. Increase of epidermal red. 

 II. Decrease of epidermal red. 



C. Changes involving leaf-shape 41 



Summary and comparisons 41 



Distribution of the Bud Variations among Different Clones 43 



Environmental Influence 47 



Seed Progeny 49 



History of Coleus 51 



Discussion . . . , 58 



Summary ' 74 



Bibliography 77 



Explanation of Figures in Plates 79 



1 



