130 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



America I was struck by the appearance, in a great number of 

 sections, of chromosome-like bodies on the spindle and in the 

 cytoplasm of the pollen mother-cells during the late telophases 

 of both the first and second divisions. These bodies in their 

 general characteristics resemble the belated chromosomes de- 

 scribed and figured by Strasburger, JucI, Tischler, and others. 

 These bodies were especially well shown in Drosera rotundijolia. 

 Studies were also made of Drosera intermedia Hayne, D. filiformis, 

 D. hinata, and D. longifolia. Numerous plants of the first three 

 species mentioned were collected in the bogs at Lakehurst, N. J. 

 during the summers of I9i3-'i4-'i5. Flowers of all sizes were 

 fixed in a number of fixing solutions such as Carnoy's, Bouin's, 

 Merkel's, and Flemming's mixtures. The best results were ob- 

 tained with Flemming's medium fixative. Flowers of D. binata 

 were obtained from plants cultivated at the New York Botanical 

 Garden. Similar fixing solutions were used on these flowers. 

 My material of D. longifolia,^ of which I had relatively few plants, 

 was kindly sent to me by Professor John Davidson from Vancouver 

 Island. Its identification is unquestionable as shown by com- 

 parison with critically determined material in The New York 

 Botanical Garden. The flowers were sent to me already fixed in 

 Carnoy's, Merkel's, and Flemming's solutions. Living material 

 available for identification purposes was also sent. A number 

 of stains were used but Flemming's triple stain gave the best 

 figures. 



The nuclear phenomena are so much alike in the species studied 

 that I shall treat of them collectively except where special mention 

 is necessary. To make more certain the interpretation of my 

 observations on the reduction divisions I have also studied the 

 somatic divisions in the ovary and stamens. 



Somatic divisions.— -Th-Q vegetative cells of the flower as well 

 as the young archesporial cells are very favorable for study though 

 the nuclei are not large. In the resting state the nuclear material 

 is made up of a fine linin network with a number of minute but 

 sharply defined chromatic bodies (Fig. i). These bodies are 



' Through the kindness of Professor N. Willo, who sent me herbarium specimens of 

 the Norwegian Drosera longifolia and D. intermedia Ilaync, I was able to study and 

 compare these two species with our American forms. I find these species quite distinct 

 and readily separable, as maintaiiuci by Dr. N. L. Britton ('07). 



