332 Scott. — On two new instances of Spinous Roots. 
EXPLANATION OF PLATES XV AND XVL 
Illustrating Dr. Scott’s paper on Spinous Roots. 
PLATE XV. 
Dioscorea prehensilis , Benth. Tuber, with mass of spinous roots springing 
from and enclosing it. The normal roots are those arising from the base of the 
stem. About one-fifth of natural size. 
PLATE XVI. 
Moraea, sp. Base of stem, with clusters of spinous roots. 
Fig. i. Seen in section : on the left a corm is well shown. 
Fig. 2. In surface view : almost natural size. 
Both from photographs by Messrs. Gunn and Stuart. 
