352 Floristik, Geographie, Systematik etc. 



Bei den artenreichen Gattungen werden Schlüssel zur Bestim- 

 mung der papuanischen Arten gegeben. 



W. Herter (Berlin-Steglitz). 



ürban, I., Sertum antillanum. III. (Rep. spec. nov. p. 331—343. 

 1916.) 



Enthält folgende Neuheiten von den Antillen: 



Coccoloba Ekmani Krb. sp. n. (Cuba), Polygala appressa ßenth. 

 var. insularis Chod. v. n. (Trinidad), P. brachyptera Griseb. var. 

 subecristata Chod. v. n. (Trinidad), P. {Orthopolygala, Penicillatae) 

 ephema Chod. sp. n. (Trinidad), Hippocratea cubana Urb. sp. n. 

 (Cuba), H. pachyphylla Urb. sp. n. (Cuba), Salacia granulata Urb. 

 sp. n. (Tobago), Telemachia [Urb. g. n. Hippocrateacearum] trini- 

 tensis Urb. sp. n. (Trinidad), Marcgravia tobagensis Urb. sp. n. 

 (Tobago), Myrica tobagensis (Kr. et Urb.) Urb. c. n. (Tobago), Euge- 

 nia grenadensis Urb. sp. n. (Grenada), E. anafensis Urb. sp. n. 

 (Cuba), E. Sloanei Urb. sp. n. (Jamaica), Mecranium tuberculatum 

 Urb. sp. n. (Haiti), Clidemia vincentina Urb. sp. n. (St. Vincent), 

 Plumeria barahonensis Urb. sp. n. (St. Domingo) , Tobagos [Urb. g. 

 n. Rubiacearum\ maleolens Urb. sp. n. (Tobago). 



Von den neuen Gattungen steht die eine der Salacia campes- 

 tris (Camb.) Walp. nahe, die andere erinnert an Spermacoce glabra 

 Michx. W. Herter (Berlin- Steglitz). 



Yasui, K., S tu dies on Diospyros Kaki. I. (The Bot. Gazette. LX. 

 p. 362—373. PI. 12, 13. 11 Fig. 1915.) 



Diospyros Kaki is not a dioecious plant, but a monoecious one 

 whose staminate flowers are disappearing under cultivation. 



The monoecious habit might have been derived from a condition 

 of perfect flowers; therefore this habit is not a primitive character 

 in this species. 



Perfect flowers do not indicate the primitive character of the 

 variety, in which they occur; they appear among other varieties 

 only through restoration of lost parts. 



The primitive character of Ebenaceae among Sympetalae is 

 indicated by the Spiral arrangement of petals, the stamen Situation, 

 although the number of stamens is not definite, and the two inte- 

 guments. 



Megaspore formation is also of a primitive character, and sug- 

 gests, along with other characters of the family, that it may have 

 some relation to the Myrtißorae. 



There is no parietal tissue in the megasporangium, which indicates 

 that Ebenaceae come from some higher isimWj oi Archychlamydeae, 

 because in the lower families parietal tissue usually occurs in the 

 megasporangium. 



Embryo sac formation occurs in the usual way, and in general 

 furnishes no evidence for the evolution of dicotyledons. It is true 

 in general, of course, that the gametophytes of angiosperms are of 

 less value for evidence concerning evolution than the sporophytes. 



The 2x number of chromosomes is 56 or 54, Jongmans. 



A.usgegeben: sy November 191'?'. 



Verlag von G.ustav Fischer in Jena. 

 Buchdruclserei A. W. Sijthoff in Leiden. 



