INDEX TO AMERICAN BOTANICAL LITERATURE 135 
Mottier, D. M. The influence of certain environic factors on the 
development of fern prothallia. Proc. Indiana Acad. Sci. 1912: 85: 
1913. 
An abstract. 
Murdock, J. Elymus arenarius at Provincetown—native or intro- 
duced? Rhodora 15: 218, 219. 13 D 1913. 
Nash, G. V. Two new American grasses. Torreya 13: 273, 274. 30 
D 1913. 
Schizachyrium curasavicum and Lasiacis Harrisii, spp. nov. 
Nelson, A., & Macbride, J. F. Western plant studies. II. Bot. Gaz. 
56: 469-479. 18 D 1913 
Allium incisum, alelawae 3 maculosus, ether crypta, Lepidium philonitrum, 
Bal. , and B. serrata spp. nov 
Chaenactis Mainsiana, Tonestus lineari. 
Niles, G. G. The North American Cypripediums. Am. Bot. 19: 
121-129. N 1913. [Illust.] 
Owen, W. L. The occurrence of Saccharomyces Zopfii in cane syrups 
and variation in its resistance to high temperatures when grown 
in solutions of varying densities. Centralb. Bakt. Zweite Abt. 39: 
468-482. 6 D 1913. 
Pickett, F. L. Length of life of Arisaema triphyllum corms. Proc. 
Indiana Acad. Sci. 1912: 77, 78. 1913. 
Pickett, F. L., & Nothnagel, M. The mosses of Monroe County. 
Proc. Indiana Acad. Sci. 1912: 69-75. 1913. 
Porter, C. E. El doctor José Arechavaleta. Bol. Mus. Nac. Chile 4: 
216-218. 1912. 
Prain, D. Index Kewensis plantarum phanerogamarum: supplemen- 
tum quartum, 1-252. Oxford. 1913. 
Quehl, L. Mamillaria echinoidea Quehl und Mamillaria glanduligera 
Dietrich. Monats. Kakteenk. 23: 162, 163. 15 N 1913. 
Rich, W. P, Chenopodium carinatum on Cape Cod. Rhodora 15: 220. 
13-D 1913, 
Robinson, B.L.  Erigeron pusillus a valid species. Rhodora 15: 205- 
209. 13 D 1913. 
Roig, J.T. Las especies y variedades de malangas cultivadas en Cuba. 
Cuba Estacion Exp. Agron. Bol. 21: 3-12. pl. 1-11. Au 1913. 
Rolfe, R. A. New orchids; Decade 41. Kew Bull. Misc. Inf. 1913: 
338-343. D 1913. 
Includes Xylobium se isa Trichocentrum panamense, and Sigmatostalix 
bicornuta from South Amer 
