INDEX TO AMERICAN BOTANICAL LITERATURE 221 
Sherwood, E. C. Hydrogen-ion concentration as related to 
the Fusarium wilt of tomato seedlings. Am. Jour. Bot. 
10: 537-553. pl. 38. 31 D 1923 
Shamel, A. D., Pomeroy, C. S., & Caryl, R. E. Bud selection 
as related to quantity production in the Washington navel 
orange. Jour. Agr. Research 26: 319-322. pl. 1, 2. 17 N 
1923. 
Smith, C. P. Studies in the genus Lupinus—IX. Bull. Torrey 
Club 50: 373-388. 24 Ja 1924. 
Smith, H. B. Stomatal behavior of plants in the greenhouse in 
winter. Pap. Michigan Acad. Sci., Arts & Lett. 2: 109-117. 
D 1923. 
Smith, R. W., Waldron, L. R. & Clark, J. A. Improvement of 
Kubanka durum wheat by pure-line selection. U.S. Dept. 
Agr. Dept. Bull. 1192: 1-14. f. 1-4. N 1923. 
Spegazzini, C. Nota sobre el Alpa-sandia. Physis 7: 135-138. 
12 D 1923. 
Dioscorea microbotrya Griseb. of Argentina. 
Standley, P. C. New species of plants from Salvador. II. 
Jour. Washington Acad. Sci. 13: 436-443. 4 D 1923. 
Cashalia, gen. nov., and new species in Piper (1), Cucatlania (1), Capparis 
(1), Sedum (1), Prunus (1), Acacia (1), Pithecollobium (1), Apalatoa (1), 
Cashalia (1), and Amerimnon (1). 
Stapf, O. Mazxillaria chrysantha. Curtis Bot. Mag. 149: pl. 
6979. 26 N 1923. [with text.] 
Species of Orchidaceae from Brazil. 
Stapf, O. Tecophilaea cyanocrocus. Curtis Bot. Mag. 149: 
pl. 8987. 26 N 1923. pea text.] 
Species of Amaryllidaceae from Chile 
Stout, A. B. The physiology of ‘acsateainiee Am Jour. 
Bot. 10: 459-461. 27 N 1923. 
Suksdorf, W. A new saxifrage from Oregon. Torreya 23: 106, 
107. D 1923. 
Saxifraga Gormani, sp. nov. 
