16 Rhodora [ JANUARY 
d' Oreille, Aug. 1, 1892 (Sandberg, MacDougal & Heller, no. 817) : 
Nevaba, Reno (received from Zhomas Meehan) : COLORADO, Piedra, 
July 12, 1899 (C. F. Baker, no 572) : New Mexico, without locality, 
1847 (ener, no. 603) ; Santa Fé Canon, alt. 2460 m., July 2, 1897 
(A. A. & E. G. Heller, no. 3798) : White Mountains, alt. 2160 m., 
Aug. 1, 1897 (4. O. Wooton, no. 267) ; Chama, Sept. 5, 1899 (C. F. 
Baker, no. 570) : ARIZONA, Willow Spring, alt. 2200 m., July, 1874 
(7. T. Rothrock, no. 242), July 5, 6, 1890 (Edw. Palmer, no. 626); 
Fort Apache, June 21-30, 1890 ( Edw. Palmer, no. 579) ; vicinity of 
Flagstaff, alt. 2160 m., July 8, 1898 (D. T. MacDougal, no. 258). — 
The original specimen from Drummond was probably from Norway 
House on the Saskatchewan and is approached by Bourgeau's plant 
from that region which, however, has the throat of the calyx more 
densely bearded than in the Rocky Mountain plants or as shown in 
the original plate of the Drummond plant. 
GRAY HERBARIUM. 
‘THE CORRECT DISPOSITION OF SISYMBRIUM NIAGARENSE. — In his 
monograph of the genus Sisymbrium Eugène Fournier described in 
1865 a new species, S. niagarense, collected at Niagara and said to be 
nearly related to the common hedge-mustard, S. officinale. Indeed, 
Fournier ventured the suggestion that it might be the S. officinale of 
Pursh and of Elliott. Unable from the description to place the plant 
more accurately and equally unable to identify it with any particular 
form of Sisymbrium from central North America, Dr. Gray? early 
suggested that it probably was only a form of S. officinale. This view 
(properly guarded by a mark of interrogation) was repeated in the 
Svnoptical Flora and by Dr. Watson in his Bibliographical Index, 
while in the Index Kewensis the identity of Sisymbrium niagarense 
and S. officinale is recorded without any qualification. 
On visiting the Jardin des Plantes in Paris, last July, the writer 
was permitted, through the kindness of Prof. Bureau and the staff 
of the herbarium, to examine Fournier'stype. This, however, proved 
to be Brassica nigra, Koch, the common black mustard. To make 
the identity doubly certain, the specimen was subsequently reex- 
amined by the writer in company with M. Danguy of the Botanical 
! Recherches anatomiques et taxonomiques sur la famille des Cruciféres et sur 
le genre Sisymbrium en particulier; Paris, 4to., 1865. 
? Am. Journ. Sci. ser. 2, xlii. 278. 
