EXPLANATION OF THE ILLUSTRATION 
Prare XXXVIII. Sryrax riawirotius Idrobo & 
R. EF. Schultes. A. Flowering branch, one half nat- 
ural size. B. Bud, twice natural size. C. Open 
flower, twice natural size. D. Dissection of flower, 
twice natural size. EK. Young fruit, twice natural 
size. F. Young fruit showing embryo, twice natu- 
ral size. 
S. Riaipirotius forma yarosovensis Idrobo & R. E. 
Schultes. G. Portion of leaf, one half natural size. 
H. Inflorescence with bud, twice natural size. 
Drawn by Jesus M. [propo 
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