84 INDEX TO AMERICAN BOTANICAL LITERATURE 
Sprague, T. A. Begonia dichroa. Curt. Bot. Mag. IV. 8: pl. 8412. 
Ja 1912. 
A plant from Brazil. 
Standley, P. C. The American species of Fagonia. Proc. Biol. Soc. 
Washington 24: 243-250. 23 D 1911. . 
Includes Fagonia insularis, F. Rosei, F. laevis, and F. longipes spp. nov. 
Stapf, O. Elliottia racemosa. Curt. Bot. Mag. IV. 8: pl. 8413. 
Ja 1911. 
A native of the southern United States. 
Stevens, N. E. Dioecism in the trailing arbutus, with notes on the 
morphology of the seed. Bull. Torrey Club 38: 531-543. f. I-4. 
6 Ja 1912. 
Stevens, W. C. On the development of the sporangia and spores of 
Aneimia phyllitidis. Ann. Bot. 25: 1059-1068. pl. 84, 85. O 1911: 
Stevenson, J. J. The formation of coal beds—I. Proc. Am. Philos. 
Soc. 50: 1-116. 24 Ap 1g11;—II. Proc. Am. Philos. Soc. 50: 519- 
643. 15 N I911. 
Tidestrom, I. The Typhae of Maryland and Virginia. Rhodora 13: 
241-243. 19 D Iogtt. 
Thompson, W. P. On the origin of the multiseriate ray of the dicoty- 
ledons. Ann. Bot. 25: 1005-1014. pl. 77,78. O 1911. 
True, R. H., & Bartlett, H. H. Absorption and excretion of salts by 
roots, as influenced by concentration and. composition of culture 
solutions. I. Concentration relations of dilute solutions of calcium 
and magnesium nitrates to pea roots. U.S. Dept. Agr. Bur. Plant 
Ind. Bull. 231: 1-36. pl. 1 +f. 1-27. 30 Ja 1912. 
Vaupel, F. Ariocarpus Lloydii Rose spec. nov. Monats. Kakteenk. 
203170. 15 NN 108i: : 
Vaupel, F. Frederico Eichlam. Monats. Kakteenk. 21: 161-164. 
15 N 1911. [Illust.] 
Weingart, W. Cereus Spegazzinii Web. und Cereus Anisitsii K. 
Schum. Monats. Kakteenk. 21: 175,176. 15 N 1911. 
Weingart, W. Erganzung zu Cereus Damazioi K. Schum. Monats. 
Kakteenk. 21: 182, 183. 15 Dio11. [Illust.] 
Wilson, P. Notes on Rutaceae—V1I. Species of Spathelia. Torreya 
II: 262-264. f. 1-5. 12 Ja 1912. 
right, C. H. Pitcairnia tabulaeformis. Curt. Bot. Mag. IV. 7: 
pl. 8470. D 1911. 
