EXKURSIONSFLORA VON JAVA 319 



of this group, which is in course of pubHcation as a Beiheft of 

 Dr. Fedde's Repertorium, and ak-eady numbers 560 pages, is still 

 far from complete, and the general portion bearing on questions 

 of geographical distribution, the subdivision of the family, &c., 

 will not appear until the systematic account is finished. Dr. 

 Schlechter is well known as a keen collector and as specially 

 interested in Orchids, and New Guinea was undoubtedly a pro- 

 mising and largely unworked field. But even then the number of 

 novelties is remarkable. The work is an enumeration of all the 

 species known from German New Guinea, but the great majority 

 are here described for the first time. Dr. Schlechter will doubt- 

 less give statistics of the total number of genera and species when 

 discussing general relationships in his final Introduction, but some 

 idea of the total number of species may be gained from the 

 account of individual genera. Thus of Hahenaria there are 

 twenty-two species, eighteen of which are endemic and twelve 

 now described for the first time. There are thirteen species of 

 Corysanthes, all of which are new ; three each of Galeola and 

 Vanilla, also all new. The country proved remarkably rich in 

 Liparidinae ; Microstylis provides forty-eight species, Oheronia 

 fifty-nine, and Liparis fifty, and the majority of these are new. 

 There are also several new genera. Mischobulbum is established 

 to include some aberrant species of Tainia and Neiolielapliyllum ; 

 Seijalo siphon is a member of the Glomerinae near Giulianettia 

 Rolfe, which it resembles in habit ; and Cyphochihis follows 

 Appendicula in Podochilinese The account of the Dendrobiinae 

 contains some criticism of Dr. Kranzlin's monograph of the 

 group in the Pflanzenreich, and the arrangement adopted by Dr. 

 Schlechter differs in important details from that of the mono- 

 graph. The great genus Dendrobium is divided into fortj^-one 

 sections ; heft 7 carries us as far as section 20, and to species 

 no. 138, and as a very large proportion of these are here 

 described for the first time, the additions to the genus are con- 

 siderable. 



A number of valuable critical notes are included in the course 

 of the work, and wherever possible new combinations are intro- 

 duced. The descriptions of the new species are full, and include 

 measurements of the various organs. Owing to their length and 

 the absence of any emphasis of the different organs some labour 

 is involved in picking out the diagnostic characters. A clavis at 

 the beginning of each genus, or a brief diagnosis at the head of 

 each description, would have added much to the value of the book 

 from the worker's point of view. A "R "R 



Exkursions flora von Java. By Dr. S. H. Koorders. Bd. iii. 



Dikotyledonen (Metachlamydeae). 8vo, pp. viii, 498 ; 6 plates, 



4 maps, and 19 text-figures. Jena : Fischer. 1912. Price 



28 Marks. 



The two earlier volumes of Dr. Reorders' fiora of Java were 



noticed in the April number of this Journal (pp. 136-8), and the 



