76 INDEX TO AMERICAN BOTANICAL LITERATURE 
Markgraf, F. Apocynaceae, in Pilger, R., Plantae Liitzel- 
bergianae brasilienses. Notizbl. Bot. Gart. u. Mus. Berlin- 
Dahlem 8: 427. 15 Je 1923. 
Includes Aspidosperma Chodatii, sp. nov., from Brazil. 
Marsh, R.S. Seasonal variation of sulphur content in certain 
tissues of the apple tree. Bot. Gaz. 75: 400-413. f. I-9. 
25 Je 1923. 
Mattfeld, J. Compositae, in Pilger, R., Plantae Liitzelbergi- 
anae brasilienses. Notizbl. Bot. Gart. u. Mus. Berlin- 
Dahlem 8: 428-451. 15 Je 1923. 
Includes Arrojadoa and Stylotrichium, gen. nov., and new species in 
Haplostephium (1), Lynchnophora (5), Arrojadoa (1), Sidvibichiues (1), Agrian- 
thus (4), and Trichogonia (3) 
Maxon, W.R. Occasional notes on Old World ferns,—IJ. Proc. 
Biol. Soc. Washington 36: 169-177. 1 My 1923. 
McGinnis, F. W.,& Taylor,G.S. The effect of respiration upon 
the protein percentage of wheat, oats and barley. Jour. 
Agr. Research 24: 1041-1048. 23 Je 1923. 
McHargue, J.S. Effect of different concentrations of mangan- 
ese sulphate on the growth of plants in acid and neutral 
soils and the necessity of manganese as a plant nutrient. 
Jour. Agr. Research 24: 781-794. pl. 1, 2. 2 Je 1923. 
McLuckie, J. Studies in parasitism. A contribution to the 
physiology of the Loranthaceae of New South Wales. Bot. 
Gaz. 75: 333-369. pl. 14-16 + f. 1-6. 25 Je 1923. . 
Merrill, E.D. Sandoricum koetjape and Dendrobium caninum. 
Jour. Bot. 61: 172-174. Je 1923. 
Moffatt, W. S. The higher Fungi of the Chicago region. II. 
Gasteromycetes. Chicago Nat. Hist. Surv. Bull. 72: 1-24. 
pl. 1-26. My 1923. 
Moore, D. W. A botanical survey of the campus of Denison 
University [Ohio]. Jour. Sci. Lab. Denison Univ. 20: 131— 
154. pl. 17-19 + f. 1-7. Je 1923. 
Muenscher, W.C. Protein synthesis in Chlorella. Bot. Gaz. 
75: 249-267. f. 1,2. 19 My 1923. 
