REVIEWS. 575 



REVIEWS. 



Monoecious and Dioecious Grasses. 



[Pilger,R., Beitrage zui' Kenntniss der monociBchen und diocis- 

 chen Gramineen-Gattungen. Engler's Bot. Jahrb., 34, p. 377.] 



A detailed discassion of the morphology of many forms, 

 including some local ones. 



^__ J. C. W. 



The Embryo and Germination in the Cannacese and Musaceae. 



[Gatin, C. L., Recherches anatomiques sur I'embryon et la 

 germination des Cannacees et des Musacees. Ann. d. Sci. Nat. 

 Bot., IX., 8, p. 113.] 



A detailed account, partly based on material sent from Pera- 

 deniya. The embryo is remarkable for its great differentiation. 



J. C. W. 



Studies of Carica Papaya. 



[Studien uber Carica Papaya L. Usteri. Berichte der deutsch, bot. 

 GeseUsch. 25, 1907, p. 485.] 



Studies in development of the flower, which he supposes 

 originally 10-carpelied, and in pollination, 



J. C. W. 



Fruit dispersal in Adenostemma. 



[Fruit dispersal in A. viscosum Yapp. Ann. Bot., 20, 1906, 

 p. 311.] 



A detailed description of the glandular pappus, which in this 

 plant facilitates dispersal of the seeds. 



J. C. W. 



Nectaries in Diospyros. 



[Das extraflorale Nektarium und die PapUlen der Blattunterseite 

 bei Diospyros discolor Willd. Elster. Sitzb. Kais. Akad. Wien, 

 116, 1907.] 



D. discolor and other species possess nectaries on the young 

 leaves , which the author regards as adapted to the attraction of 

 ants for protection. 



J. C. W. 



