91 
from all forms of Z. hirsuta. The leaves of the former always 
have a chartaceous margin which is also common in L. dioica, 
but never occurs in L. hersuta. 
The following localities are to be added to those given in the 
Contributions. These localities are based upon specimens in the 
herbaria of the Ohio State University, Oberlin College, Lafayette 
College and Columbia University : 
Pennsylvania: S. W. Knipe, 1868; 1871; Guttenberg, 1879; 
C. E. Smith, 1864; McMinn. 
Ohio: F. B. Mason; Andrew Auten, 1896; Mr. Krebs, 1891; 
W. A. Kellerman, 1895. 
Michigan: Dr. Pitcher, 1829; F. E. Boyce, 1883. 
Isle Royale: T. C. Porter, 1865. 
Ontario: Dr.and Mrs. Britton and Miss M. Timmerman, 1889; 
T. J. W. Burgess, 1881. 
Saskatchewan: E. Bourgeau (Palliser Exp.), 1858. 
South Dakota (Black Hills): W. S. Rusby, 1887. 
_ GEuM (SIEVERSIA) TURBINATUM, 
Potentilla nivalis Torr. Am. Lyc. N. Y. 1: 32. 1827. Not 
Lapeyr, 1 782. 
Geum, Rossii Torr. & Gr. Fl. N. Am. 1: 424. In part. 1840. 
Not Steversia Rossii R. Br. 
This has gone under the name of Geum Rossii (R. Br.) DC. 
without any question ever since Torrey and Gray’s Flora was pub- 
lished in 1840. Sieversia Rossii was described from specimens col- 
lected on the Melville Island by Lieutenant Ross during Captain 
Parry’s first voyage. Geum Rossii is a distinctly arctic species, 
Tanging from the Baffin Bay Islands to Alaska. Geum turbinatum 
is found in the higher Rockies of Colorado, New Mexico, Ari- 
zona, Utah, Nevada and Southern Wyoming. It is not found in 
the mountains of British North America, and I have no record of 
its having been collected in Montana or Idaho. The two species are 
therefore separated by a distance of almost 2,000 miles. The 
arctic plant has much larger flowers, from 2 to 2% cm. wide, while 
in the Rocky Mountain plant the flower scarcely exceeds 114 cm, 
In the latter the bractlets are narrowly lanceolate and much shorter 
than the tube of the calyx, which is decidedly turbinate, espec- 
