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B. Caroline, and added B. fusca as a new species. Besides this, two 
other North American species, 2. microcarpa and B. setifolia, still 
remain uncertain. They were described by Jeger from manu- 
script names of Wilson, but the specimens in Wilson’s Herbarium 
do not agree with those in Jeeger’s, and though they probably 
antedate some of the more recent species, we cannot prove it. 
We have also learned of another species in the herbarium of Dr. 
C. Miiller, which was collected in Alabama by Dr. Chas. Mohr, 
whose name it bears, but we have seen no description nor speci- 
mens, 
It will be seen from the following pages that the specimens 
and their names have been very much confused, and it has only 
been through an extensive series of comparisons, drawings and 
measurements that we have been able to settle a few of the doubt- 
ful species, 
Through the kindness of M. Eugene Autran and the authori- 
ties at Kew and South Kensington I have been able to see all the 
available European types. By the kindness of Dr. Robinson, 
Sulivant’s whole collection of the genus was placed at my dis- 
Posal, and Prof. D. C. Eaton also conferred on me a similar favor. 
Dr. S. E, Jelliffe has verified all my spore measurements. 
A thorough examination of the specimens in Wilson’s and. 
Hampe’s herbaria at South Kensington, London, would probably 
throw more light on some of the doubtful points, and as we shall 
show, Dr. Miiller could, if he would, settle two others. We still feel 
that more study is necessary to properly understand the genus, | 
and we would ask collectors in our Southern States to pay particu- — 
lar attention to it, as even yet more new species may be looked for. 
Classification. 
I. Eu-Brucuia. Neck of the capsule equal to or shorter than 
the Spore-sac; seta immersed or very slightly exserted ; lid not 
ifferentiated. 
a. Caulescent species. 
1. Paroicous Leaves subulate, more or less papillose; spores 
‘Pinose. (B. flexuosa, B. Sullivanti, B. Texana, B. curviseta, B. 
onnellit.) ; 
2. Autoicous, Leaves short, smooth, erect-appressed, con- 
“ave, clasping, vein not excurrent into a subulate point; spores 
"culate or pitted. (B. Halli, B. fusca.) 
