218 INDEX TO AMERICAN BOTANICAL LITERATURE 
Spoehr, “H. A. Interrelation of photosynthesis and_ respiration. 
Carnegie Inst. Washington Year Book 19: 64. 3 F 1921. 
Spoehr, H. A. & McGee, J.M. Rate of respiration of leaves in relation 
to amino-acid and carbohydrate content. Carnegie Inst. Wash- 
ington Year Book 19: 63, 64. 3 F 1921. 
Sprenger, C. Beobachtungen aneinigen Yucca-Arten. Mitt. Deutsch- 
Dend. Ges. 1920: 138-149. 1920. 
Sprenger, C. Mitteilungen iiber meine Yucca-Hibriden und -Formen. 
Mitt. Deutsch. Dend. Ges. 1920: 96-138. pl. 21, 22. 1920. 
Stahel, G. De Zeefvatenziekte (Phloéemnecrose) van de Liberiakofhe 
in Suriname. Dept. Landb. Suriname Bull. 40: 1-26. Mr 1920. 
[Illust.] 
Standley, P. C.* Some interesting plants in Glacier Park, Montana. 
Gard. Chron. III. 78: 275. 4h 1920. 
Stevenson, J. A. Enfermedades del citro en Puerto Rico. Rev. 
Agric. Puerto Rico 4, no. 3: 34-46; no. 4: 25-36; no. 5:22-27. 1920. 
Taylor, A.M. Occurrence of Funaria ma EI (L.) Sibth. Bryolo- 
gist 24: 9; 5.32 Mr 1921. 
Teuscher, i. Die Unterscheidungsmerkmale der haufigsten Larix- 
Arten. Mitt. Deutsch. Dend. Ges. 1920: 69-72. 1920. 
Thielmann, —. Ein riesiges Taxodium mexicanum. Mitt. Deutsch. 
Dend. Ges. 1920: 326. pl. 30. 1920. 
Thom, C., & Church, M. B. Aspergillus flavus, A. Oryzae, and asso- 
ciated species. Am. Jour. Bot. 8: 103-126. f. 7. 19 Mr. 1921. 
Torrey, R. : Telephragmoxylon and the Heo of. wood parenchyma. 
35: 73-77- pl. 3 +f. 1-3. Ja 192 
EAR gen. nov., from the Comanchean — of Texas. 
Vaupel, F. Echinocereus subinermis S.-D. Monatsschr. Kakteenk 
26:98. Jl 1916. [Illust.] 
Vaupel, F. Neue siidamerikanische Kakteen. Monatsschr. Kakteenk. 
26: 120-125. 15 Au 1916 
Species of Cereus (4) and Echinocactus (1). 
Wann, F. B. The fixation of free nitrogen by green plants. Am. 
Jour. Bot. 8: 1-29. pl. r. 9 Mr 1921. 
Species of Chlorophyceae studied experimentally. 
Waters, C. E. More about early days of the American Fern Society. 
Am. Fern Jour. 11: 16-19. Mr 1921. 
Waters, C. E. The ferns of Baltimore [Maryland] and vicinity. Am. 
Fern Jour. 11: 19-25. Mr 1921. 
