BULLETIN 
OF THE 
TORREY BOTANICAL CLUB. 
Vol. XVIII] New York, January 20, 1891. (No. |. 
Notes upon Uvularia, Oakesia, Diclytra and Krigia. 
By TxHropor Horm. 
(Plates CXI-CXIII). 
Uvularia perfoliata and Oakesia sessilifolia—These two 
species have been hitherto united in the genus Uvularia of Linné, 
but have recently been separated by S. Watson,* on account of dif- 
ferences in the leaves, whether they are “ perfoliate or sessile,” 
the position of the flowers, whether they are “terminal or not,” 
and the structure of the capsule, whether it is ‘“‘three-lobed or 
three-winged.” There are, however, other characters taken from 
the rhizome, which are not less important, although they may not 
even in connection with the above mentioned characters, be suf- 
ficient to distinguish them as representing two genera. The 
descriptions in systematic works of the rhizome of these two 
_ plants are generally defective. 
A. Michauxt says of the genus Taiilavio “ Radix fibrosa, 
_aphylla, ” but does not supply any special characters for the rhi- 
zomes of the different species. Bartont describes U. perfoliata, 
-as having “root white, palmate divisions cylindrical, garnished 
__ with a few yellowish-white radicles,’ while he in the second 
volume of the same work mentions the rhizome of UW. sesstlifolia 
“Root perennial, fleshy, whitish, resembling the root of U. per- 
aa foliata.” He gives a very good illustration of the species per- 
cae hsee and figures the anterior part of the rootstock, but without | 
lies Proceedings American Acad. Vol. XIV. 
_ + Flora Boreali-Americana, Vol. I, 1803, p. 199. 
¢ Flora of North America, Vol. I and II, 1822. 
