228 INDEX TO AMERICAN BOTANICAL LITERATURE 
Rigg,G.B. A bog forest. Ecology 3: 207-213.f.1,2. Jl 1922. 
Riko, B. P. Nutz-und Edelhélzer Mexicos. Tropenpflanzer 
25: 16-22, 52-56. F 1922. 
Rimbach, A. Lebensweise von Chloraea membranacea. Ber. 
Deutsch. Bot. Ges. 40: 322-326. f. 1-6. 1922. 
Robbins, R. B. Selection through the choice of seeds from 
dominant plants of an allogamous population. Genetics 
7: 508-512. S 1922. 
Robbins, W. J. Effect of autolized yeast and peptone on 
growth of excised corn root tips in the dark. Bot. Gaz. 
74:°59-79. fc 1-8. 15 S 1022: 
Roberts, R. H. The development and winter injury of cherry 
blossom buds. Wisconsin Agr. Exp. Sta. Bull. 53: I-24. 
pl. 1-4+f. 1-7. Jl 1922. 
Robinson, B. L. The mikanias of northern and western South 
America. Contrib. Gray Herb. 64: 21-116. 18 Ap 1922. 
Robinson, B. L. Records preliminary to a general treatment 
of the Eupatorieae—I. Contrib. Gray Herb. 64: 3-21. 
18 Ap 1922. 
Includes new species in A geratum (1) and Mikania (17). 
Rose, J. N. Byrnesia; Weinbergii. Addisonia 7: 37, 38. Pl. 
243. 4D 1922. 
New genus of uncertain fatherland. 
Rose, J. N. Echinocereus Baileyi. Addisonia 7: 41. pl. 245. 
4D 1022. 
Rose, J. N. Graptopetalum pachyphyllum. Addisonia 7: 45. 
pl. 247. 4 D 1922. 
New species from Mexico. 
Rose, J. N. Runyonia longiflora. Addisonia 7: 39, 40. pl. 244. 
4 D 1922. 
New genus and species from southern Texas. 
Round, E. M. A modern plant fossil. Bull. Torrey Club 49: 
63; 64. J; 2...32 Ap 1922. 
