Vlll MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



Kern, Frank D. Japanese species of Gymnosporangium 245 



Farr, Clifford Harrison. Cytokinesis of the pollen-mother-cells 



of certain dicotyledons (with plates 27-29) 253 



LiPMAN, Chas. B, Plant ecology and the new soil fertility 319 



Graves, Arthur H. Chemotropic reactions in Rhizopus nigricans. 323 

 Stout, A. B. Self- and cross-pollinations in Cichorium Intyhus 



with reference to sterility (with plate 30) 333 



Norton, J. B. S. • Variation in Tithymalopsis 455 



Parwell, Oliver Atkins. The genus Hippochaete in North 



America, north of Mexico 461 



Hollick, Arthur. A fossil fern monstrosity (with plates 31, 32). .473 



"Small, John K. Recent exploration in southern Florida 475 



JIydberg, p. a. Vegetative life zones of the Rocky Mountain 



region 477 



Seaver, Fred J. Bermuda fungi 501 



Beal, W. J. Some things learned in managing a botanic garden. . 513 

 Kellerman, Karl F. Cooperation in the investigation and control 



of plant diseases 517 



Black, Caroline A. The nature of the inflorescence and fruit of 



Pyrus Malus (with plates 33-40) 519 



Taubenhaus, J. J. A contribution to our knowledge of silver 



scurf {Spondylocladium atrovirens Harz) of the white potato 



(with plates 41-43) 549 



Lloyd, Francis E. The embryo-sac and pollen grain as colloidal 



systems 561 



Britton, N. L. The vegetation of Anegada 565 



