PAPERS ON BOTANY 143 



1. There is not at present satisfactory evidence that true 

 ^entrosomes occur in the spermatogenesis tissue of the Bryo- 

 phytes. 



2. Polar bodies, which often occur, do not seem to be 

 identical with the blepharoplasts. 



3. There is strong evidence, on the other hand, that the 

 blepharoplast is of cytoplasmic origin. 



4. It seems extremely doubtful if the various structures 

 termed respectively "limosphere," "nebenkorper," and "kino- 

 plasmic plates" occur regularly and constantly in the majority 

 of the members of the Byrophytles. 



5. In the observation and description of protoplasmic 

 phenomena in this particular field it is not only wise, but quite 

 necessary to bear in mind the small size of the cells, the dense 

 protoplasmic contents with relatively little cell and nuclear 

 sap, resulting in slow and difficult penetration of the killing 

 fluids, and especially the extreme plasticity of the cells during 

 this period of marked and rapid transformation of the andro- 

 cyte into the mature and actively motile sperm. 



TWO LEAF-FUNGI OF CYCLAMEN 

 William Trelease, University of Illinois 



An inspection of any of the host lists for parasitic fungi 

 shows that the florists' cyclamen in its many forms is remark- 

 ably free from such parasites, and one is always surprised if he 

 finds disease or mutilated plants of any of the varieties under 

 ordinarily good conditions of greenhouse treatment, though 

 flower and leaf monstrosities are not infrequent. The prin- 

 cipal diseases of the cyclamen are due to nematode root or 

 tuber injuries and an associated rather obscure bacterial rot, 

 and to attacks of Tliidavia or Atractium, Few flower-inhabit- 

 ing fungi have ever been observed on cyclamen; Ascochyta cy- 

 claminis with the pyenidial Scptoria corollae, and the conidial 

 form of Sclcrotinia, Botrytis cincrca. On the leaves scarcely 

 more parasites have been found: Scptoria cyclaminis, Ph\l- 

 losticta cyclaminis, and P. cyclamincUa, a Glomerelta referred 



