596 INDEX TO AMERICAN BOTANICAL LITERATURE 
Loesener, T. Mexikanische und zentralamerikanische Novitaten. IV. 
Repert. Sp. Nov. 12: 217-244. 25 Je 1913. 
Includes new species as follows: pitts Daagoeame H. Gross, Coccoloba 
oaxacensis H. Gross, Pisonia linearibracteat erl, Heliocarpus Caeciliae Loes., 
utilon Seisdigason Ulbrich, Sphaeralcea eahat Ulbrich, Hauwya Donnellsmithit 
cle: H. longicornuta Loes., Xylopleurum deserticolum Loes., and Cordia Langlassei 
Loes. 
Macallum, A. B. Surface tension and vital phenomena. Univ. 
-Toronto Stud. Physiol. 8: 3-82. pl. 7. 1912. 
BSc in English in revised form from an article “‘ Oberflachenspannung 
und Lebense nungen,”’ in vol. 11, Ergebnisse der Physiologie. 
McBeth, 3 S Cellulose as a source of energy for nitrogen fixation. 
U.S. Dept. Agr. Plant. Ind. Circ. 131: 25-34. 5 Jl 1913. 
Macbride, T. H. Notes on Iowa saprophytes. Proc. Iowa Acad. Sci. 
18: 57-60. I9DI. 
Marie-Victorin, . Découverte du Lycopode petit-cypres dans 
les Laurentides. Naturaliste Canadien 39: 166-170. My 1913. 
Martin, J. N. The physiology of the pollen of Trifolium pratense. 
Bot. Gaz. 56: 112-126. f. r 14 Au 1913. 
Matthew, G. F. A new flora in the older Palaeozoic rocks of southern 
New Brunswick, Canada. Trans. Roy. Soc. Canada III. 6: 83-99- 
Be te 2. tka. 
Melhus, I. E. The powdery scab of potato (Sbongaspora Solani) in 
Maine. Science II. 38: 133. 25 Jl 1913. 
Merrill, G.K. New and interesting lichens from the state of Washing- 
ton. Bryologist 16: 56-59. Jl 1913. 
Includes Bialora myriocarpella sp. nov. 
Meyer, R. Einiges iiber Echinocactus longihamatus Gal. und seine 
Varietaten. Monats. Kakteenk. 23: 91-93. 15 Je 1913- 
Meyer, R. Uber Echinocactus haematacanthus Monv. Monats. 
Kakteenk. 23: 94-96. 15 Je 1913. 
Mickleborough, J. A report on the chestnut tree blight, the fungus, 
Diaporthe parasitica Murrill. 1-16. f. 1-4. Harrisburg. My 1909- 
[Illust.] 
Pennsylvania Department of Forestry. 
Miller, F. A. Breeding medicinal plants. Am. Jour. Pharm. 85: 291- 
301. f. 1-4. Jl 1913. 
Nathorst, A. G. Contributions to the carboniferous flora of north- 
eastern Greenland. Occurrence of the plant-fossils. Meddelelser 
om Grénland 43: 339-346. pl. 15, 16 +f. 1-4. 22 Mr 1911. 
