INDEX TO AMERICAN BOTANICAL LITERATURE 125 
\ 
Hodgson, R. W. Some abnormal water relations in Citrus trees of the 
arid southwest and their possible significance. Univ. Calif. Publ. 
Agr. 3: 37-54. pl. 12. 29S 1917. 
Hopkins, L. S. A new species of fern (Polystichum Jenningsi). Ann. 
Carnegie Mus, 11: 362, 363. pl. 37. 5 N 1917. 
Jeffrey, E.C. The anatomy of plants i-x + 1-478. f. 1-306. Chicago. 
O 1917. 
Jennings, 0. E. Pierygophyllum acuminatum at Ohio Pyle, Pennsyl- 
vania. Bryologist 20: 100. N 1917. 
Korstaim, C. F. The indicator significance of native vegetation in the 
determination of forest sites. Plant World 20: 267-287. S 1917. 
Latham, R. Habitat of Cephalosia Francisci on Long Island, N. Y. 
Bryologist 20: 63, 64. 15 Au 1917. 
Levy, D. J. Some experiments on the germination of moss spores on 
agar. Bryologist 20: 62, 63. 15 Au 1917. 
Lloyd, C. G. Mycological notes 50: 701-716. f. 1049-1074 + por- 
trait. O 1917. 
Léveillé, H. Catalogue des plantes du Yun-Nan, avec renvoi aux 
diagnoses originales observations et descriptions d’espéces nou- 
velles. 1-299. f. 1-68. 1917. 
Contains reference to, and figure of, an American plant, Epilobium Arechavaletae 
Lownes, A. E. Further notes on the orchids of the Asquam Region, 
Rhodora 19: 235, 236. 21 N 1917. 
Luckan, L. Ecological morphology of Abutilon Theophrasti. Kansas 
Univ. Sci. Bull. 20: 219-228. pl. 1-3. Ja 1917. 
MacCaughey, V. The guavas of the Hawaiian Islands. Bull. Torrey 
Club 44: 513-524. 20 N 1917. 
MacCaughey, V. The phytogeography of Manoa Valley, Hawaiian 
Islands. Am. Jour. Bot. 4: 561-603. f. I-14. 12 D 1917. 
MacCaughey, V. A survey of the Hawaiian land flora. Bot. Gaz. 64: 
89-114. f. 1-5. 15 Au 1917. 
MacCaughey, V. Vegetation of Hawaiian lava flow. Bot. Gaz. 64: 
386-420. f. 1-22. 16 N 1917. 
Macdonald, G. B. Evergreen trees for lowa. Yearbook lowa Dept. 
Agr. 17: 437-464. pl. 1, 2 +f. 1-18. 1917. 
Also published in Iowa Agr. Exp. Sta. Bull. 170: 1-16. Mr 1917. 
MacDougal, D. T., & Spoehr,H. A. The measurement of light in some 
of its more important physiological aspects. Science II. 45: 616- 
618. 15 Je 1917. 
, L. M. The crown canker disease of rose. Phytopathology 
7: 408-417. f. 3-3. 3 D-19%7. 
Cylin 
ium scoparium. 
