218 



argument in favor of the hypotlicsis that stipules Hkc leaf-shcaths 

 are tlie remains of primitive foliaceous appendages from which 

 originated the monocotyledons and dicotyledons, (Saporta et 

 Marion, L'E volution du Regne Vegetal) and he concludes with 

 the following deductions : 



1st. That this species is a link between the sections Caprifo- 

 lium and Xylosteum, that is between the perfoliate and imperfo- 

 liate Lo??ice7'(r. 



2d. That the presence of stipules in the genus Pentapyxis will 

 nullify the characters that absolutely distinguish this genus from 



late species). 



Calif L 



3d. That stipules in the order Capri foliacea: do not have that 



same 



taxinomical value heretofore attributed to them, as in the 

 species, or even in the same Individual they may be more or 

 less developed or are absent altogether. 



4th. That the presence of stipules in the Rubiacea: loses som_ 

 of Its value as a distinguishing character between that order and 

 the Caprifoliaccae. A M V 



Index to Recent American Botanical Literature. 



Arancarioxylon of Kraus,7vith Compiled Descriptions and Par- 

 tial Symmomy of the Species— A Revision of the Genus. F. 

 H. Knowlton. (Proc. U. S. Nat. Mus. xii. 601-617). 

 In this contribution an attempt is made to arrange the various 

 fossil genera Aranearites, Dadoxylon, Pissadendron, Cordaites, 

 etc., according to their supposed affinities, and to give a complete 

 synonomyand bibliography of each .species. In this 

 ment three genera only are recognized, Cordaites, Unger, D^d- 

 oxylon, Endl., and Arancarioxylon, Kraus^ Eleven species are 

 included under the first mentioned genus, twenty-six under the 

 second and thirteen u.ider the last. The structure of the wood 

 of each species is described and the habitat given. Aside from 



arrange- 



th 



c value of the descriptions, the citations of synonomy and bib- 

 liography will be appreciated by all students who have occasion 

 to study this class of fossil plants. 



Bab cock Hi 



(Rept. Dept. Nat. Hist. Northwestern ) 



Univ. 1888, PI), 9, 10). 



An account of the donation and probable extent of the above 



