226 INDEX TO AMERICAN BOTANICAL LITERATURE 
Nelson, J. C. The bracken as a poisonous plant. Am. Fern 
Jour. 12: 125-127. 30 D 1922. 
Nelson, J.C. Muscari comosum in Oregon. Rhodora 24: 208- 
210. 6 O 1922. 
Nelson, J. C. A new weed from Oregon. Torreya 22: 86-88. 
O 1922. 
Salvia Aethiopis L. 
Nevermann, F. Das Balsaholz. Tropenpflanzer 25: 49-52. 
Ap 1922. 
Newton, R., & Gortner, R. A. A method for estimating hydro- 
philic colloid content of expressed plant tissue fluids. Bot. 
Gaz. 74: 442-446. 21 D 1922. 
Osterhout, G. E. Two new plants from western Colorado. 
Bull. Torrey Club 49: 183, 184. 8 Jl 1922 
Nuttallia marginata and Acrolasia humilis, spp. nov. 
Overholts, L. O. Mycological notes for 1920. Bull. Torrey 
Club 49: 163-173. pl. o +f. 1-14. 8 Jl 1922. 
Pammel, L. H., & Cratty, R. I. Notes on some plants of the 
Arapahoe National Forest and Rocky Mountain National 
Park [Colorado]. Proc. lowa Acad. Sci. 27: 51-73. f. 1-9. 
1920. 
Pammel, L. H., & King, C. M. The germination of some trees 
and shrubs and their juvenile forms. Proc. Iowa Acad. 
Sei. 27: 75-80. f. 10, 11: 1920. 
Parlin, J. C. Waldsteinia in Maine. Rhodora 24: 124. 28 
Au 1922. 
Parodi, L.R. Las gramineas de la region de Concordia [Argen- 
tina]. Rev. Facult. Agron. y Veter. Univ. Nac. Buenos 
Aires 4: 24-1o1. f. I-4. 1922. 
Pearl, R. Trends of modern ae Science II 56: 581-592. 
24 N 1922. 
Pearson, W. H. West Indian Hepaticae. Jour. Bot. 60: 217- 
228.4922. 
’ Includes 3 new. species. 
