REVIEW. 
Koorders, S. H. Exkursionsflora von Java umfassend die Bliitenpflanzen 
mit besonderer Beriicksichtigung der im hochgebirge wildwachsende 
Arten. 1 (1911), pp. XXIV + 413 (Monocotyledonen) ; 2 (1911), pp. 
742 (Dicotyledenen Archichlamydeae) ; 3 (1912), pp. VIII + 498 
(Dicotyledonen Metachlamydeae) . Jena: Gustav Fischer. 
Java is botanically better known than is any other island of 
the Malay Archipelago, and its rich and varied flora has long been 
studied and by many botanists. Up to the present time, on 
account of the very numerous articles dealing with the subject, 
it has been quite impossible for the working botanist to gain any 
comprehensive idea of the flora of the island as a whole, the total 
number of genera and species, habitats and ranges of the latter, 
and other data of interest. Doctor Koorders has undertaken to 
compile a complete list of Javan flowering plants, but his work 
is immensely more valuable than a mere enumeration of genera 
and species, on account of the included keys, references, and 
other data. With his extensive knowledge of the subject, based 
on long residence in Java, very comprenhensive botanical explora- 
tion, and critical study of all available material. Doctor Koorders 
has succeeded in completing an exceedingly valuable and appar- 
ently eminently usable work. He has included analytical keys 
to the families, genera, and species, the key to families alone 
occupying 48 pages of text. This extensive treatment is largely 
due to the necessity of frequently including the same family 
under two or more heads on account of exceptional characters 
in various genera or species. An excellent glossary of technical 
terms is included. 
The arrangement of families and genera is that of Engler and 
Prantl’s “Natiirlichen Pflanzenfamilien,” and it is the first work 
of great importance on the Malayan flora that has been published 
after this system. As practically all recent works on the floras 
of tropical Asia and Malaya have followed the sequence of 
Bentham & Hooker’s “Genera Plantarum,” an alphabetical list 
of families has been given with their equivalents in the latter 
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