INDEX TO AMERICAN BOTANICAL LITERATURE 649 
Griggs, R. F. Observations on the geographical composition of the 
Sugar Grove flora. Bull. Torrey Club 40: 487-499. f. I-10. 10S 
1913. 
Giissow, H. T. The barberry and its relation to black rust of grain, 
Phytopathology 3: 178, 179. 14 Au 1913. 
Harris, J. A. An illustration of the influence of substratum hetero- 
geneity upon experimental results. Science II. 38: 345, 346. 
§ S.1013. 
Harter, L. L., & Field, E. C. A dry rot of sweet potatoes caused by 
Diaporthe Batatatis. U.S. Dept. Agr. Plant Ind. Bull. 281: 7-38. 
pl. 1-4+f. 1-4. 1 My 1913. 
Heribert-Nilsson, N. Oecnothera-problemet. Svensk Bot. Tidsk. 7: 
1-16. 25 Mr 1913. _ [Illust.] 
Herter, W. José Arechavaleta. Monats. Kakteenk. 23: 125-127. 
15 Au 1913. - 
Hill, G. R. Respiration of fruits and growing plant tissues in certain 
gases, with reference to ventilation and fruit storage. Cornell 
Univ. Agr. Exp. Sta. Bull. 330: 377-408. Ap 1913. 
Hull, E. D. Advance of Potamogeton crispus L. Rhodora 1§: 171, 
172. 3 @ 1013. 
Johnston, J. R. The nature of fungous diseases of plants. Porto 
Rico Sugar Producers’ Assoc. Cire. 2: 3-25. f. 1-9. My 1913. 
Jostmann, A. Pilocereus lanatus (H. B. K.) Web. var. Haaget (Po- 
selg.) Schelle. Monats. Kakteenk. 23: 125. 15 Au 1913. [Illust.] 
Kellerman, K. F. The use of congo red in culture media. U.S. Dept. 
Agr. Plant Ind. Circ. 130: 15-17. 21 Je 1913. 
Keyser, A. Variation studies in brome grass. (A preliminary report). 
Colorado Agr. Exp. Sta. Bull. 190: 3-20. pl. I-19. Je 1913. 
Kranzlin, F. Amaryllidaceae peruvianae, bolivienses, brasilienses. 
Bot. Jahrb. Beibl. 50: 2-5. 19 Au 1913. 
Includes Collania Herzogiana, Bomarea Ulei, B. Loreti, and Eucharis Ulei, spp. 
nov. : 
Kranzlin, F. Buddleiae americanae nonullis gerontogaeis adjectis. 
Bot. Jahrb. Beibl. 50: 33-47. 19 Au I913. 
Includes 22 new species in Buddleia. 
Kranzlin, F. Calceolariae peruv., aequat., argent. Bot. Jahrb. Beibl. 
50: 67-75. 19 Au 1913. 
Includes 9 new species in Calceolaria. 
Loesner, T. Celastraceae andinae. II. Bot. Jahrb. Beibl. 50: 8-10. 
19 Au 1913. 
Includes Maytenus apurimacensis and M. andicola, spp. nov. 
