I24 INDEX TO AMERICAN BOTANICAL LITERATURE 
Spegazzini, C. Breves notas cactologicas. An. Soc. Ci. Argen- 
tina 96: 61-75. Au 1923. [Illust.] 
Includes A ylostera, gen. nov., and Frailea Bruchi, sp. nov., from Argentina. 
Sprague, T. A. On the type-species of Bignonia. Jour. Bot. 
GL 302; F943: * TF (ors. 
Standley, P. C. Cualderonia and Exandra, two new genera of 
the family Rubiaceae. Jour. Washington Acad. Sci- 
13: 289-293. 19 Jl 1923. 
Calderonia salvadorensis and Exandra rhodoclada, gen. and spp. nov., 
from Salvador. 
Stanton, T. R. Naked oats. Jour. Hered. 14: 177-182. f. 14- 
10, - 3 JL-1024: 
Stapf, O. LEchinocereus Baileyi. Curtis Bot. Mag. 148: pl. 
S971. 13 Au 1923. 
Steil, W. N. The antherozoid of the genus Riccardia. Bull. 
Torrey Club 50: 197-202. f. 1-5. 6 Jl 1923. 
Stevens, O. A. Plants which attract popular attention. Sci. 
Mo. 17: 114-128. f. 1-6. Au 1923. 
Notes made in North Dakota. 
Stoneback, W. J. & Calvert, R. Histology and chemistry of 
the avocado. Am. Jour. Pharm. 95: 598-612. f. I-I2. 
Au 1923. 
Taylor, W. R. Bryophyte herbatiien of the University of 
Pennsylvania. Bryologist 26: 39, 40. 21 Au 1923. 
Tharp, B. C. Ecologic investigations in the Red River valley. 
Univ. Texas Bull. 2327: 89-156. 15 Jl 1923. 
Tisdale, W. B. & Williamson, M. M. Bacterial spot of lima 
bean. Jour. Agr. Research 25: 141-154. pl. 1-3. 21 
Jl 1923. 
Totten, H.R. Development of the fruit-body of a new parasitic 
Rhizopogon. Jour. E. Mitchell Sci. Soc. 39: 101-109. 
bh. I-7- “AW 1023. 
Rhizopogon parasiticus, sp. nov., from North Carolina. 
Tottingham, W. E. Temperature effects in plant metabolism. 
Jour. Agr. Research 25: 13-30. pl. 1-4. 7 Jl 1923. 
