382 INDEX TO AMERICAN BOTANICAL LITERATURE 
Freeman, E.M. ‘Theether freezing microtome, in botanical technique. 
Science II. 25: 747-749. 10 My 1907. [Illust. ] 
Greenman, J. M. New species of Senecio and Schoenocaulon from 
meee Proc. Am, Acad. Arts & Sci. 43: 19-21. 26 Je 1907. 
wo new species of Sezecio and three of Schoenocaulon. 
Grifiths, D. eee some west American fungi. Bull. Torrey 
Club 34: 207-211. 11 Je 1907. 
Includes new species in Esti Ustilago, Sorosporium, Urocystis, Aecidium, 
and Puccinia, 
Grignan, G. T. Trois beaux Salvia. Salvia azurea grandiflora, S. 
splendens Boule de feu, S. splendens Surprise. Rev. Hort. 79: 279- 
281. f. 94+ pl. 16 Je 1907. 
Harper, R. M. Competition between two oaks. Plant World 10: 
114-117. f. 20, 22. My 1907. 
Harrison, A. K., and others. Reports on the flora of the Boston 
district, I. Rhodorag: 81-86. 3 Je 1907. 
Harshberger, J. W. The Mexican cypress. Forest Leaves 11: 24. 
Ap 1907. [Illust.] 
Hassler, E. Plantae paraguarienses novae vel minus cognitae IV. 
Bull. Herb. Boiss. II. 7: 445-460. 30 My 1907. [ Illust. ] 
New species in Lobelia (2), Paspalum, Panicum, and Sida. 
Hay, G. U. Observations on weather and plants, 1906. Bull. Nat. 
Hist. Soc. New Brunswick §: 559-561. 1907. 
Hay, G. U. Report of committee on botany. Bull. Nat. His. Soc. 
New Brunswick 5: 563, 564. 1907. 
Haynes, C.C. Ten lophozias. Bryologist 10: g—12. p/, 2, 7. 2 
Ja 1907. 
Heald, F. D. Field work in plant pathology. Plant World 10: 104- 
109. My 1907 
Hemsley, W. B. American rubber plants. Kew Bull. Misc. Inf. 
1907: 153-156. My 1907. 
Hemsley, W. B.  Eupatorium Standulosum. Curt. Bot. Mag. IV. 
3: pl. 87379. Je 1907. 
Native of Mexico. 
Hibbard, R. P. The influence of tension on the formation of mechan- 
ical tissue in plants. Bot. Gaz. 43: 361-382. 17 Je 1907. 
Holm, T. The genus Carex in north-west America. Beih. Bot. Cen- 
tralb. 227: 1-29. 1 Je 1907. 
Holway,E. W.D. North American Uredineac. 1: 57-80. f. + pl. 
24-36. to My1g07. 
Includes descriptions of 3 new species of Puccinia. 
