Plant Geography. — General. 39 
of the several phytogeographic regions of North America. The title of the 
most important papers, named or omitted from the accompanying history, will 
be given in the bibliography which follows in list form with more complete 
bibliographic details, than has been possible in the historic account. The 
attempt has not been made to furnish a complete synopsis of the literature 
dealing with the phytogeography of North America’). 
$2. Plant Geography. 
1. General. 
No general work solely devoted to the plant geography of North America 
has ever been published. The only work of a general nature, which may be 
said to offer any satisfactory information on this important subject, is a recent 
pamphlet by A. ENGLER entitled: Die pflanzengeographische Gliederung Nord- 
amerikas erläutert an der nordamerikanischen Anlage des neuen königlichen 
botanischen Gartens zu Dahlem-Steglitz bei Berlin, mit einer Verbreitungskarte 
und einem Orientierungsplan, issued in 1902 as Notizblatt des königlichen 
botanischen Gartens und Museums zu Berlin, Appendix IX. .Several works, 
however, ought to be mentioned as.of especial phytogeographic significance, 
viz., Statistics of the Flora of the Northern United States by Asa GRAY in 
American Journal of Science for 1856; The Botany of the United States 
Geological Exploration of the Fortieth Parallel under CLARENCE KınG by 
SERENO WATSON and D. C. EATon 1871; ROBERT BROWwN’s article in the 
Proceedings of the British association for 1871 on the geographic distribution 
of the floras of northwest America; ROTHROCK’s Botany of the Wheeler Survey 
1874; Die Florengebiete Nordamerikas by BRENDEL, noticed in Botanischer 
Jahresbericht 1874; Die Waldungen von Nordamerika, by H. MAYR 1890. 
In the Transactions of the Academy of Sciences of St. Louis for 1877 
GEORGE ENGELMANN contributed a paper on the Geographical Distribution of 
the North American Flora. The following papers by Asa GRAY, collected by 
SARGENT in the Scientific Papers of Asa Gray, must be consulted by any 
earnest student of the American flora: Sequoia and its History; er 
graphy and Archaeology; The Flora of North America and Characteristics o 
the North American Flora, which appeared in Nature for 1885. In conjunction 
with J. D. HooKER was issued the Vegetation of the Rocky Mountain Region, 
and a Comparison with that of other Parts of the World 1881. Tenth Census 
Report on the Forests of North America with volume of maps by CHARLES 
S. SARGENT 1884; In 1881 appeared an account in the Report of Canadian 
Geological Survey (1879—80) of the northern limit of American forest trees 
with map. 
EEE 
1) Auf er hat Prof. Harshberger die ursprünglich aus- 
ee — 
Wie es auch in den anderen Bänden der V.d.E. gebräuchlich ist. (Drude.) 
