~ 
INDEX TO AMERICAN BOTANICAL LITERATURE 229 
Fernald, M. L. Arenaria—I. The unity of the genus Aremnaria. 
Rhodora 21: 1-7.—II. The type of the genus Alsine. 7-9.—III. 
The earlier names for Alsinopsis. 9-12——IV. The American repre- 
sentatives of Arenaria sajanensis 12-17.—V. The specific identity 
of Arenaria groenlandica and A. glabra. 17-21.—VI. The American 
variations of Arenaria verna. 21-22. 10 F 1919. 
A. marcescens sp. nov. is described. 
Ferris, R. S. A new plant record for California. Bull. So. Calif. 
Acad. Sci. 18:13. Ja 1919. 
Holacantha emoryi. 
Griggs, R. F. Scientific results of the Katmai expeditions of the Na- 
tional Geographic Society IV. The character of the eruption as 
indicated by its effects on nearby vegetation. Ohio Jour Scix 9: 
173-209. Ja1g19. _ [Illust.] 
Gruber, C. L. Fragrant wildflowers. Am. Bot. 25: 8-13. F 1919. 
Hartwell, B. L., & Damon, S. C. The influence of crop plants on those 
which follow—I. Rhode Island Agr. Exp. Sta. Bull. 175: I-30. 
f.1. Je 1918. | 
Hayden, A. The ecologic foliar anatomy of some plants of a prairie 
province in central Iowa. Am. Jour. Bot. 6: 69-85. pl. O-Tg. 1 
Mr 1919. 
Howe, M. A. On some fossil and recent Lithothamnieae of the 
Panama Canal Zone. Smithsonian Inst. Nat. Mus. Bul. 103: I-13. 
plo Ptr. 19°F rot 
Includes Archaeolithothamnium episporum, Lithothamnium Vaughan 
Isthmi, spp. nov. 
Hunter, O. W. Bacteriological studies on alfalfa silage. Jour. Agr. 
Research 15: 571-592. f. 1-3. 16 D 1918. 
Jenkins, A. E. Brown canker of roses caused by Diaporthe umbrina. 
Jour. Agr. Research 15: 593-600. pl. D, 46, 47 +f. 1-3. 16D 
1918. 
Jenkins, E. W. Cotton and some of its diseases and insects. Univ. 
Florida Agr. Exp. Bull. 15: 1-19. f. I-7- F 1919. 
Johnston, I. M. Contributions on southern Californian botany. Bull. 
So. Calif. Acad. Sci. 18: 18-21. Ja 1919. 
Includes Monardella saxicola sp. nov. 
Killip, E. P. Fern-hunting in Panama. Am. Fern Jour. 9: 5-17. pl. 
I, 2. Mr 1919. 
Kunkel, L. O. Wart of potatoes: a disease new to the United States. 
U. S. Dept. Agr. C. T. & F. C. D. Cire. 6: 1-14. f. 1-3. 6 F 1919. 
44 and L. 

