Alexander W. Evans, 



Figure i 



A-E. RiccARDiA PREHENSiLis (Hook. f. & Tayl.) Massal. 

 A. Photosynthetic branch-system with two female branches, growing 

 point of main axis at left, x 8. B. Transverse section of axis, x loo. 

 C. Transverse section of ultimate branch, x loo. D. Surface of ulti- 

 mate branch near apex, x 225. E. Longitudinal section of ultimate 

 branch near margin, x 225. The figures were all drawn from a specimen 

 without number collected at Corral by R. Thaxter. 



F-I. RiccARDiA Savatieri (Steph.) Evans 

 F. Photosynthetic branch-system, x 8. G. Transverse section of axis, 

 X 100. H. Transverse section of ultimate branch, x 100. I. Cells of two 

 outer layers of ultimate branch in longitudinal section, x 300. H was 

 drawn from a specimen collected at Halt Bay by A. Cunningham, No. 183; 

 G-I, from a specimen collected by A. E. Douglas at Grappler Bay. 



