78 INDEX TO AMERICAN BOTANICAL LITERATURE 
Pritchard, F. J., & Porte, W.S. Watery rot of tomato fruits. 
A physiological study of Oospora lactis; effect on the host; 
penetration of the cell walls by enzymic action. Jour. Agr. 
Research 24: 895-906. pl. 1-4. 16 Je 1923. 
Raber, O. Permeability of cells to electrolytes. Bot. Gaz. 75: 
298-308. 19 My 1923. | 
Rau, V. Inheritance of some morphological charactersin Crepis 
capillaris. Univ. California Publ. Agr. Sci. 2: 217-242. pl. 
42, 43 + f. 1-3. Je 1923. 
Reed,G.M. Varietal resistance and susceptibility of sorghums 
to Sphacelotheca Sorghi (Link) Clinton and Sphacelotheca 
cruenta (Kiihn) Potter. Mycologia 15: 132-143. pl. 14, 15- 
31 My 1923. 
Reed, G[uilford]. Thespecies pt from the point of view of a 
physiologist and bacteriologist. Am. Jour. Bot. 10: 234- 
238. 10 My 1923. 
Reed, H. S., & Haas, A. R. C. Growth and composition of 
orange trees in sand and soilcultures. Jour. Agr. Research 
24: 801-814. pl. 1-5. 2 Je 1923. 
Ricker, P.L. The protection of our native plants. Nat. Mag. 
1: 35-41. My 1923. [Illust.] 
Rigg, G. B. An old British herbal. Bot. Gaz. 75: 318-320. 
19 My 1923. 
Rydberg, P. A. Notes on Fabaceae—I. Bull. Torrey Club 50: 
177-188. 25 My 1923. 
Includes 2 new species in Homalobus. 
Rydberg, P. A. Ruibes cereum. Addisonia 8: 7, 8. Pl. 200. 15 
My 1923. 
Native of the Pacific United States. 
Sanford,G.B. The relation of soil moisture to the development 
of common scab of potato. Phytopathology 13: 231-236- 
J. I-3. 11 My 1924. 
Sargent, C. S. Notes on North American trees, XI. Jour. 
Arnold Arb. 4: 99-107. 8 My 1923. 
Includes 8 new species of Crataegus. 
