INDEX TO AMERICAN BOTANICAL LITERATURE 127 
Reddick, D. Effect of soil temperature on the growth of bean plants 
and on their susceptibility to a root parasite. Am. Jour. Bot. 4: 
513-519. 24 N 1917. 
Rehder, A. The genus Fraxinus in New Mexico and Arizona. Proc. 
Am. Acad. Arts & Sci. 53: 199-212. O a 
Includes Fraxinus Standleyi and F. Lowellii, spp. n 
Reynolds, E. S. Internal telia of rusts. kes II. 46: 140, 141. 
1o Au 1917. 
Riddle, L. W. Pyrenothrix nigra gen. et sp. nov. Bot. Gaz. 64: 513- 
15. f. Ig. 18 Dagre: 
Riddle, L. W. The genus Parmeliopsis of Nylander. Bryologist 20: 
69-76, pl. 20 +f. 1, 2. 13 01917. 
Ridgway, C. S. Method of photographing culture plates. Phyto- 
pathology 7: 388-391. f. 1. 30 1917 
Rietz, H. L., & Smith, L. H. A statistical study of some indirect 
effects of certain selections in breeding Indian corn. Jour. Agr. 
Research 11: 105-146. f. 1-24. 22 O 1917. 
Ritter, N. Histology of Astragalus mollissimus. Kansas Univ. Sci. 
Bull. 20: 197-208. pl. 1-4. Ja 1917. 
Rock, J. F. Hawaiian trees—a criticism. Bull. Torrey Club 44: 545, 
> SG. a7 1) 1017, 
Rock, J. F. The Ohia Lehua trees of Hawaii. Hawaii Board Agr. & 
Forest. Bot. Bull. 4: 1-76. pl. 1-31. Au 1917. 
Rock, J. F. Revision of the Hawaiian species of the genus Cyrtandra, 
section Cylindrocalyces Hillebr. Am. Jour. Bot. 4: 604-623. 
Re oe Pigs FE Gd 
Cyrtandra Waianuensis sp. nov. and several new varieties are described. 
Rogers, J. M., & Earle, F.S. A simple and effective method of pro- 
tecting citrus fruits against stem-end rot. Phytopathology 7: 361— 
367, 3 UF igi. 
' Rolfe, R. A. Ondontoglossum chiriquense. Curt. Bot. Mag. IV. 13: 
pl, 6725. 3S 4917. 
A plant from Central Ameri 
Rolfe, R. A. Odsatisbission platycheilum. Curt. Bot. Mag. IV. 13: 
Pl. 8778. S$ 1917. 
A plant from Guatemala. 
Rolfe, R. A. New orchids: Decade XLV. Kew Bull. Misc. Inf. 
1917: 80-84. Jl 1917. 
Includes Pleurothallis mennlsege Epidendrum tricarinatum, Mazxillaria 
Shepheardii, and Dichaea ciliolata from America. 
Rorer, J. B. Algal renee eF cacao. Proc. Agr. Soc. Trinidad & 
Tobago 17: 345-348. -S 1917. 
