INDEX TO AMERICAN BOTANICAL LITERATURE 315 
Cavanagh, L. M. Notes on the genus Catharinea in Iowa. Proc. 
Iowa Acad. Sci. 28: 223, 224. Ap 1921. 
Chermezon, H. Sur la position systématique du genre Remirea. 
Bull. Soc. Bot. France 69: 809-814. 1923. 
Chiovenda, E. La culla del cocco. (Contributo alla ricerca 
della patria originaria della Palma del Cocco.)—V. Web- 
bia 5: 359-450. 1923. 
Colin, H., & Franquet, R. Greffes d’Helianthus a inuline sur 
soleil annuel et sur diverses Composées. Bull. Mus. Nat. 
Hist. Natur. 1923: 119-121. 1923. 
Conard, H. S. A manual of the ferns and “fern-allies”’ of 
Grinnell [Iowa] and vicinity. Proc. Iowa Acad. Sci. 29: 
317-327+: 1922. 
Conard, H.S. A manual of the Gymnosperms (“‘evergreens’”’) 
of Iowa, both native and cultivated. Proc. Iowa Acad. 
Sci. 29: 328-338. .1922. 
Coulter, M. C. Outline of genetics, with special reference to 
plant materials. Pp. i-viii + 1-212. f. 1-34. Ap 1923 
Cratty, R. I. Dr. Rudolph Gmelin and his collection of Min- 
nesota, Wisconsin and Iowa plants. Proc. Iowa Acad. Sd: 
28: 249-255. 3921. 
Cratty, R. I. Two additions to our list of Cruciferae. Proc. 
Iowa Acad. Sci. 28: 256-262. f. 32-35. 1921. 
Cremer,H. Untersuchungen iiber die periodischen Bewegungen 
der Laubblatter. Zeits. Bot. 15: 593-656. f. I-66. 1923. 
Czurda, V. Zur Kenntnis der Brutzweibeln von Lycopodium Se- 
lago und L. lucidulum. Flora 116: 457-475. f. 1-7. 1923. 
| Darlington, H.T. Contributions to the flora of Gogebic County, ~ 
Michigan. Pap. Michigan Acad. Sci., Arts & Lett. 1: 
74-82. F 1923. 
Davidson, A. New plants from S. California. Bull. S. Cali- 
fornia Acad. Sci. 22: 5, 6, 70-74. pl. 16-20. 1923. 
New species in Aster (1), Dudleya (1), Gilia (2), Hasseanthus (1), and 
Allium (1). 
