Index to recent Literature relating to American Botany 
Abrams, Le R. A new AHemizonia from California. Torreya, 2: 
122. 2 Au. 1902. 
Hemizonia grandifiora Abrams. 
Ashe, W. W.’ Some new Pennsylvania Thorns. Ann. Carnegie Mu- 
seum, IT: 387-398. My. 1902. 
Includes 16 new species of Crataegus. 
Britton, N. LL. An undescribed Species of Hydrophyllum. Torreya, 
2: 123. 2 Au. 1go2. 
Lydropiryllum patens sp. nov. 
Buchenau, F. Tropaeolaceae. Das Pflanzenreich, 4": 1-36. St 
I-14. 8 Jl. 1902. 
Carpenter, I. The Protection of Native Plants. Plant World, 5:. 
129, 130. Jl. rgo2. 
Chesnut, V. K. Problems in the Chemistry and Toxicology of Plant 
Substances. Science, II. 15: 1016-1028. 27 Je. 1902. 
Chester, F. D. Sundry Notes on Plant Diseases. Bull. Del. Agric. 
Exp. Sta, $22 1-16. - Jes 20n2:. . 
Cockerell, T. D. A. Notes on Sphaeralcea and Malvastrum. Bull. 
So. Cal. Acad. Sci. 1: 106-108. 2 Au. 1902. 
Cook, 0. F, Zodlogical Nomenclature in Botany. Science, II. 16: 
3°, 31. 4 Jl. 1g02. 
Davy, J.B. The cultivated Guavas and their botanical Differences. 
Rept. Calif, Agric. Exp. Sta. 1898-1901, Part I: 86-88. I9g02. 
Doty, H. A. The Milkweed’s Story. <A specific Example of Cross- 
Pollination in Fowers, with Photographs showing just how it is done. 
Country Life in America, 2: 197, 198. f. 86-z0r. S. 1902. 
Eggert, H. Notes on Verbena. Torreya, 2: 123,124. 2 Au. 1902. 
Verbena racemosa sp. nov. and V. brevibracteata (A. Gray) nom. nov. 
way, B. T. Applied Botany, retrospective and prospective. 
mite, II. 6: 49-59. 11 Jl. 1902. 
> of Chairman, Section G, A. A. A. S. 
: ano ng, W. F, The new Laboratory and Greenhouse for Plant Phys- 
ology at Smith College. Science, II. 15: 933-937- f. 1-6. 13 
Je. Ig02, 
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