INDEX TO AMERICAN BOTANICAL LITERATURE 33 
Pennell, F. W. S lariaceae of Cuba. Proc. Acad. Nat. 
Sci. Pie 75: 1-21. 24 Ap 1923. 
Plitt, C. C. A new species of Crocynia. Bryologist 26: 16-19. 
f. I, 2. -16 Ap 1923. 
Crocynia Moxleyi, sp. nov., from California. 
Record, S. J. The Parana pine of Brazil. Am. For. 29: 215. 
Ap 1923. [Lllust.] 
Reed, E. Hypothesis of formative stuffs as applied to Bryo- 
phyllum calycinum. Bot. Gaz. 75: 113-142. f. I-10. 20 
Ap 1923. 
Rendle, A. B. George Clifford’s herbarium and the “Hortus 
Cliffortianus.”” Jour. Bot. 61: 114-116. Ap 1923. 
Includes discussion of the names Grislea L. and Combretum L. 
Rhodes, G. H. Perpetuating the redwoods. Am. For. 29: 
147-152. Mr 1923. [lIllust.] 
Richards, B. L. Further studies on the pathogenicity of 
Corticium vagum on the potato as affected by soil tempera- 
ture. Jour. Agr. Research 23: 761-770. pl. 1 + f.1. 3 
Mr 1923. 
Riddle, L. W. The lichens of the Isle of Pines. Mycologia 15: 
68-88. 30 Mr 1923. 
Includes Monobdlastia, gen. nov., and 14 new species. 
Robbins, C. A. Cladonia Beaumentit- in Massachusetts. 
Rhodora 25: 46, 47. 6 Mr 1923. 
Robinson, B. L. The need of monographic activity in American 
botanical taxonomy. Science II 57: 307-311. 16 Mr 1923. 
Rogers, L. M. Development of the prothallium of Lygodium 
palmatum. Bot. Gaz. 75: 75-85. pl. 4-6. 23 Mr 1923. 
Rosa, J. T. Note on an indirect effect of spraying potatoes 
with Bordeaux mixture. Am. Jour. Bot. 10: 113-116. f. 
I, 2: 30 Mr 192%. 
Safford, W.E. Discovery of the ancestral form of Dahlia Jaure- 
zit. Jour. Hered. 13: 377-381. f. 21-23. 25 Ap 1923. 
