386 MR. T. W. WOODHEAD ON THE 
forms. Stomata (fig. 52) are more abundant and are not sunk 
as in the sun-form. 
A comparison of longitudinal sections through the base of the 
Figs. 48-55. 
Leaves of Holcus mollis growing under different conditions, 
Fig. 48. Sun-form leaf in Trans. Sect. 
49. Lower epidermal cells of ditto. 
50. “Shade "-leaf of Holcus mollis, reflexed form. Trans, Sect. 
51. Lower epidermal cells of ditto. 
52. Stomate of ditto. 
53. Longitudinal Sect. base of blade of erect leaf-form. 
54. Thickened cells of ditto. 
55. Longitudinal Sect. base of blade of reflexed leaf-form. 
— 
blade at the point where it joins the sheath shows interesting 
modifications in the two forms. 
Fig. 53 is such a section of the erect sun-form. The cells of 
the base are clear and transparent, and stand out sharply from 
