32 BOTANICAL GAZETTE [JULY 
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EXPLANATION OF PLATES I-III 
The figures were drawn with the aid of a Bausch & Lomb camera lucida. All 
except figs. r and 19 were drawn under a Zeiss apochromatic objective 2™™ aPp- 
1.30, with a Zeiss compensating ocular 18. The figures are reduced one-fourth in 
reproduction, giving a magnification of nearly 3000 diameters, Fig. 1 was drawn 
—_ a 2™™ objective and compensating ocular 6; fig. 19 under B. & L. objective 
re N. A. 1.32 and Zeiss ocular 18, 
