INDEX TO AMERICAN BOTANICAL LITERATURE 567 
Mitchell, F. Plant immigrants of 1909. Ontario Nat. Sci. Bull. 6: 66. 
1910. 
Morris, F. J. A. Orchids of Ontario. Ontario Nat. Sci. Bull. 6: 7-33. 
1910. 
Mottier, D. M. Notes on the sex of the gametophyte of Onoclea Struthiop- 
teris. Bot. Gaz. 50: 209-213. 21 S 1910 
Mottier, D.M. Nuclear phenomena of sexual reproduction in angiosperms. 
Am. Nat. 44: 604-623. O 1910. 
Palmer, T. C. A newdiatom. Proc. Philadelphia Acad. Nat. Sci. 62: 
460-463. pl. 35. S 1910. 
Navicula socialis Palmer. 
Penhallow, D. P. The relation of paleobotany to phylogeny. [In The 
paleontologic record.}|_ Pop. Sci. Mo. 77: 333-338. 
Pennington, L. H. The effect of longitudinal compression upon the pro- 
duction of mechanicai tissue in stems. Bot. Gaz. 50: 257-284. f. 1, 2. 
15 O 1910. 
Phillips, F. J. Teratology of the banana. Plant World 13: 227-229. 
f. 4, 5. S 1910. 
Power, F. B., & Rogerson, H. Chemical examination of the tuberous root 
of Ipomoea Horsfalliae Hooker. Am. Jour. Pharm. 82: 355-360. Au 
1910. [Illust.] 
Queh!, L. Echinocactus uncinatus Gal. var. Wrightti Engelm. Monats. 
Kakteenk. 20: 104, 105. 15 Jlroro. [Hlust.] 
Quehl, L. Mamillaria Emskétteriana Quehl, n. sp. Monats. Kakteenk. 
20: 139, 140. 15S 1910. 
Quehi, L. Mamillaria Bédekeriana Quehl, n. sp. Monats. Kakteenk. 
20: 108, 109. 15 Jl rg10.  [Illust.] 
Riddle, L. W. The North American species of Stereocaulon. Bot. Gaz. 
50: 285-304. f. 1-g. 15 O 1910. 
Rydberg, P. A. Studies on the Rocky Mountain flora—XXIII. Bull. 
Torrey Club 37: 443-471. 5 O 1910. 
Schlechter, R. Orchidaceae novae et criticae. Repert. Nov. Spec. 8: 453- 
458. 10S 1910. 
7 new American species described. 
South, F. W. The control of scale insects in the British West Indies by 
means of fungoid parasites. West Ind. Bull. 11: 1-30. 1910. [Illust.] 
