aA AMERICAN MIDLAND NATURALIST 
large antennaria bundles and those of the National Museum. 
Not many, if indeed any of the collectors are aware of the urgent 
need there is of searching for and gathering the male plants— 
often so very scarce—as well as the female; and in consequence, 
we have scores of sheets of specimens showing female plants only; 
and the species are not few of which the characters reside not 
at all in the female plants, but are pronounced enough in the 
males. In view of these facts, not a few specimens well chosen 
and carefully prepared occur in the collections, even some with 
both sexes represented, which I do not venture either to refer to 
species already described, or to name and characterize as new; but 
I make mention of several such, adding some informal account 
of their peculiarities, thus inviting those in the field to further 
study of them. It is also with such an end in view that, in the 
case of common and widely dispersed species, I cite with unusual 
fulness the stations which the herbaria show for them. 
It is hoped that the following attempt at a key to the species 
may be found helpful. 
Leaves small, 1-2 in. long, narrow. 
Leaves with some distinction of blade and petiole..... 1. A. neodioica. 
Leaves with little or no distinction of blade and petiole. 
Mature leaves glabrous above. 
Fertile plants tall; scale tips broad, entire; 
Sterile splantsmloweraacioce oo ekieine erent 2. A. neglecta. 
Fertile plants not low, but the sterile taller; 
Scallestips eroseh Oretiinalo ial te eae nae 4. A. erosa. 
Fertile plants tall, the sterile low;  scale- 
ElipSmcoanselyasn Othe deer eter 5. A. longifolia. 
Mature leaves hardly, or very tardily glabrate 
above. 
Seales of fertile involucre narrow, their tips 
NAS Hig HUB ARON ed AT ona nd alg SecA Hic BA sploie ernie 3. A. Wilsonii. 
Seales of fertile involucre broad, their tips 
broad), obtuse sik eis. denn es Hees iat aOm sAcane brascemsiss 
Leaves of smallest size, %-1% in. long, not, more than 
twice as long as wide. 
Leaves obovate-spatulate, glabrous above even when 
OLLI Meer oh Whe) Miss aici Cee we SN hd net enema een Tg 7. A. campestris. 
Leaves very short, round-obovate, hoary above even 
in age. 
Rlantihardlyistolonierouse amine erie et 8. A. parvula. 
Plant conspicuously slender-stoloniferous...... g. A. Lunellii. 
Leaves large, 2-4 inches long including a distinct narrow 
petiole, the blades 34-2 inches wide. 
