ee ee ee Oe ST, UU 
ca 4 ~~. =, . = 
LIST OF ILLUSTRATIONS. 
Frontispiece: The nun orchid. 
In the library . : toe ; : : . Facing p. 7 
The Cape daisy . ; : ; ; : 5 Facing p. 14 
In the herbarium , ; : ; ; ‘ ; Facing p. 19 
The graduate laboratory . ; ‘ A ; ;: Facing p. 22 
Plates 1-17. Opuntia . ‘ ‘ : : . Following p. 36 
Plate 18. Agave in Lower California . ; - Facing p. 37 
Plates 19-72. LowerCaliforniaAgaves . .  . Followingp. 66 
Plates 73-99. Agave, section Applanatae ‘ ‘ s p. 98 
Plates 100-103. Agave angustifolia i . . = p. 100 
Plates 104-108, Yuccas of the rupicola series : es p. 104 
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