2 MISC. PUBLICATION 797, U. S. DEPT. OF AGRICULTURE 
contains approximately 3,757 primary and 3,084 subsidiary titles, 
a total of 6,841, and treats an area of about 3,044,174 square 
kilometers (1,175,357 square miles). Thus, it has one primary 
title for each 810 square kilometers (8138 square miles), while 
the first part had one for every 31,672 square kilometers (12,228 
square miles), or a ratio of 39 to 1 in favor of the present part; 
if the subsidiary titles are included in both cases, the ratio rises 
to 61 to 1. 
The purpose of this publication is essentially, as in the pre- 
viously published part, to furnish an annotated, geographically 
and alphabetically arranged catalog of all the now useful floras 
and floristic works, including those in periodical or serial litera- 
ture, that list or describe the complete vascular flora (or the 
phanerogams or pteridophytes only) of any region or locality. 
The work also includes all essentially complete publications on 
useful, weedy, poisonous, or woody plants, vernacular names, and 
botanical bibliography; and for each country (but mostly not for 
parts of a country) one or more works on ecology and phy- 
togeography, when these are available. For the most part only 
the later works relating to a given area or subject are treated in 
full, although earlier publications of the same scope are nearly 
always mentioned under the titles of works that have replaced 
them. In general, all available local floras (such as the floras of 
towns or equivalent districts), regardless of age, are entered 
even though there may be later works (such as county floras) of 
wider scope that cover their territory. A considerable proportion 
not only of the very local floras but also of those of counties, 
provinces, and similar regions are old and by modern standards 
inadequate, but they are included because they will be of use to the 
local student and because they are needed to give a complete 
picture of our present knowledge. Publications dealing with only 
a part of the phanerogamic flora, such as a single family or larger 
division, or a single group of useful plants, such as those produc- 
ing dyes or resins, are excluded, except for complete papers on 
edible or medicinal plants. No attempt has been made to evaluate 
the titles listed, but the presence of an item may be regarded as 
an indication that it has some current utility. Publications that 
are primarily ecological or phytogeographical have been excluded 
unless they contain fairly complete lists of the plants of the area 
discussed. Works of the “‘popular” type, intended for beginners 
in botany, have been omitted except for a few that provide a 
sufficient number of illustrations to be of value to the scientific 
worker. 
Except for unintentional omissions, this work contains all the 
available nominally complete publications on the vascular flora 
and the useful (including cultivated) and injurious plants, 
vernacular names, and botanical bibliography of the countries 
treated, as well as a considerable number of incomplete publica- 
tions on the same subjects, which for one reason or another have 
seemed worthy of inclusion. It differs in scope from the first part 
principally by including all complete works on pteridophytes, 
weeds, and poisonous and cultivated plants; by giving a few 
