INDEX TO AMERICAN BOTANICAL LITERATURE 395 
Howard, W.L. Anexperimental study of the rest period in plants. II. 
The summer rest of bulbs and herbaceous perennials. Missouri 
Agr. Exp. Sta. Research Bull. 15: 3-25. Ap1915; III. Pot grown 
woody plants. Missouri Agr. Exp. Sta. Research Bull. 16: 1-27. 
f. 1-12. Ap 1915; IV. Seeds. Missouri Agr. Exp. Sta. Research 
Bull. 17: 1-58. Ap 1915. 
Howe, M.A., & Lyon, H. L. Algae. [In Rock, J. F., Palmyra Island 
with a description of its flora.] College of Hawaii Publ. Bull. 4: 31, 
32. I9 A 
Includes Cladophora sabulosa Lyon sp. nov. 
Kranzlin, F. Orchidaceae quaedam Americanae. Arkiv. Bot. 142: 
3-8. 29 Ap gr 
Includes descriptions of 5 new species from Brazil and 2 from Mexico. 
Levison, J. J., & Richards, J. L. Ornamental and shade trees. 
Damage by spurs. Am. Forestry 22: 228-231. Ap 1916. [Illust.] 
Lloyd, C. G. Mycological notes 40: 541-556. f. 743-765 + frontis- 
piece. F 1916. 
Loessener, T. Mexikanische und Zentralamerikanische Novititen. 
V. Repert Sp. Nov. 14: 97-113. 15 O 1915 
Includes brief articles by various authors not indexed separately. 
Lorenz, A. Notes on Nardia crenuliformis (Aust.) Lindb. Bryologist 
19: 24. pl. 2. Mr 1916. 
Lyon, H. L. Fungi. [In Rock, J. F., Palmyra Island with a descrip- 
tion of its flora.} College Hawaii Publ. Bull. 4: 33. ie Ap 1916. 
Includes Auricularia adnata and Polystictus palmyrensis, spp. 
Martin, G. W. The common diseases of the pear. nes ree Agr. 
Exp. Sta. 52: 1-12. f. 1-6. 1 D 1915. 
Meier, F. C. Watermelon stem-end rot. Jour. Agr. Research 6: 
149-152. pl. 17. 24 Ap 1916. 
Merriman, M. L. Nuclear division of Spirogyra. II. Nuclear divi- 
sion in S. bellis. Bot. Gaz. 61: 311-324. pl. 18-20. 18 Ap 1916. 
‘Meyer, R. Ejiniges iiber den Echinocactus gibbosus P. DC. Monats. 
Kakteenk. 26: 20-23. F 1916.  [Illust.] 
Michell, M.R. The embryo sac of Richardia africana Kth, Bot. Gaz. 
61: 325-336. pl. 21-23. 18 Ap 1916. 
Millspaugh, C.F. Contributions to North American Euphorbiaceae— 
VI. Field Mus. Nat. Hist. Publ. Bot. 2: go1-420. Ap 1916. 
Includes descriptions of 15 new species, Chamaesyce (9), Acalypha (2), Croton (3), 
and Tragia (1). 
