INDEX TO AMERICAN BOTANICAL LITERATURE 31 
Larsen, J. A. Association of trees, shrubs, and other vegetation 
in the northern Idaho forests. Ecology 4: 63-67. 21 F 
1923. 
Le6n, Brother. A trip to Pico Turquino Rae Jour. New 
York Bot. Gard. 24: 49-62. Mr 1923 
Levine, M. Studies on plant cancers. V. Leafy crown galls 
on tobacco plants resulting from Bacterium tumefaciens 
inoculations. Phytopathology 13: 107-116. pl. 5-7. 13 
Mr 1923. 
Lichtenwalner, D. C., Flenner, A. L., & Gordon, N. E. Adsorp- 
tion and replacement of plant food in colloidal oxides of 
iron and aluminum. Soil Sci. 15: 157-165. Mr 1923. 
Lloyd, F. E. The cytology of vegetable crystals. Science II. 
57: 273, 274. 2 Mr 1923. 
Lorenz, A. Some Hepaticae from Grand Manan, N[ew] B[runs- 
wick]. Bryologist 26:5. 15 Mr 1923. 
Lownes, A. E. Habenaria hyperborea in Rhode Island. Rho- 
dora 25: 44, 45. 6 Mr 1923. . 
Lutz, F. E. Flowers and their insect visitors. Nat. Hist. 23: 
125-134. Ap 1923. [Illust.] 
Mangelsdorf, P. C. Heritable characters of maize. XII. 
Mealy endosperm. Jour. Hered. 13: 359-365. f. 12-15. 25 
Ap 1923. 
Marshall, M. A. Proliferous ebony spleenwort. Am. Fern 
Jour. 13: 7-13. pl. r. 13 Mr 1923. 
Martin, G. W. Food of the oyster. Bot. Gaz. 75: 143-169. 
f. I-9. 20 Ap 1923. 
Mattoon, W.R. Growth of shortleaf pine (Pinus echinata Mill.) 
planted in District of Columbia and New Jersey. Jour. 
For. 21: 284, 285. Mr 1923. 
Maxon, W.R. A new Dryopteris from Dominica. Proc. Biol. 
Soc. Washington 36: 49, 50. 28 Mr 1923. 
Dryopteris mollicella, sp. nov. 
