INDEX TO AMERICAN BOTANICAL LITERATURE 107 
Livingston, B. E. Michigan plant societies again. Science, II. 18: 
435, 436. 20 1903. 
Loew, F. A. The toxic effect of H and OH ions on seedlings of 
Indian corn. Science, II. 18: 304-308. 4S 1903. 
MacDougal, D. T. Mutations in plants. Am. Nat. 37: 737-770. 
f. I-10. N 1903. 
Malme, G. 0. A. Asclepiadaceae Paraguayenses a D:re Hassler col- 
lectae. Bihang Sy. Vet.-Akad. Handl. 27°: 1-40. pl. got. 
New species are described in Oxypetalum (6), Blepharodon and Marsdenia. 
Malme, G. 0. A. Beitrage zur Kenntnis der siidamerikanischen Arten 
der Gattung Prerocaulon Ell. Bihang Sv. Vet.-Akad. Handl. 27”: 
1-27. pl. 1-4. got. 
Nine species are recognized, of which 5 are described as new. 
Malme, G. 0. A. Ex herbario Regnelliano. Adjumenta ad floram 
phanerogamicam Brasiliae terrarumque adjacentium cognoscendam. 
IV. Passifloraceae, Aristolochiaceae, etc. Bihang Sv. Vet.-Akad. 
Hand]. 275: 1-25. f. 7-8. Tgol. 
Malme, G. 0. A. Ex herbario Regnelliano. Adjumenta ad floram 
phanerogamicam Brasiliae terrarumque adjacentium cognoscendam. 
V. Violaceae, Vitaceae, Rhamnaceae, Eriocaulaceae. Bihang Sv. 
Vet.-Akad. Handl. 27": 1-38. pl. z, 2+f. 1-5. 1901. 
New species in Cissus, Zizyphus and Papaclanthus (2). 
Malme, G.0. A. Die Flechten der ersten Regnellschen Expedition. 
II. Die Gattung Rinodina (Ach.) Stiz. Bihang Sv. Vet.-Akad. 
Handl. 28': 1-53. f. 7, 2. 31 My 1902. 
Masterman, E. E. Notes on the cocklebur. Ann. Rep. Ohio Acad. 
Cl. 9: 20, 21. 1go2. 
Masters, M. T.  Calochortus pulchellus Douglas. Gard. Chron. Ill. 
we. 523, 154, 147. 7. 52, 59. 2% Au 1903. 
Discusses the synonymy of this species and C. amabilis Purdy. 
Masters, M. T.  Crossosoma Californicum. Gard. Chron. II. 34: 
130. f, 50. 22 Au 1903. 
Maxon, W.R. A fern new to the United States. Torreya, 3: 154, 
185. 22D 1903. 
Notes the occurrence of Asplenium auritum Sw. in Florida. 
Mereschkowsky, C. Ueber Piaconeis, ein neues Diatomeen-Genus. 
Beih. Bot. Centralb. 15: 1-30. pl. 1 +f. 1-74-1903. 
Descriptions of two new genera, P/aconeis and Staurophora, both of wide distri- 
bution, 
