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North American Plants 
Believing that many individuals and institutions who do not have 
ready access to the older works on botany which contain descriptions of 
North American plants, would welcome a work of this sort, its prepara¬ 
tion has been undertaken. 
The less accessible descriptions will be taken up first, and all botanists 
are earnestly solicited to send in lists of species, the descriptions of which 
they are especially desirous of having appear in the next following series. 
The descriptions will be issued in series of 500, printed in card cata¬ 
logue form, on cards 5x7 inches, so that the cards may either be kept in 
cases, or fastened upon herbarium sheets, and incorporated with the her¬ 
barium. 
The accompanying sample descriptions have been especially selected, 
as well illustrating the usefulness of this work. Ribes niveum and Ribes 
Mzssourien.se are quoted by most botanists as synonyms of Ribes gracile. 
With the original descriptions of all three at hand, each person can form 
his own judgment as to whether the descriptions are so nearly similar, as 
to include all three plants under one species, or whether such distinct 
geographical regions as the Appalachian mountain system, the Mississippi 
valley, and the Pacific slope, each has a distinct species representing the 
gracile type. This is one illustration of many similar cases. 
Full syuonomy will be given under each species. 
The first series will be issued during 1899, and perhaps Series 2. 
Not more than two series will be issued in any year, thus making the 
maximum cost of the work $10.00 per year. 
Your name is solicited now as a subscriber to the work, payment to 
be made for each series when you receive it. 
The price is $5.00 per series, or only ONE CENT for each card. 
Send in your name at once to the publisher, 
A. A. H ELLER, 
411 West Walnut Street, 
LANCASTER, PA., U. S. A. 
