1006 Wisconsin Academy of Sciences, Arts, and Letters. 
in deep woods about Solon Springs, W£s. It is very variable 
in size. 
S. irrigua is strictly a bog plant, and is common in suitable 
places. It undoubtedly occurs in the Minnesota swamps, but 
has not yet been collected from the State. 
S. glaucocephala, reported also from Minnesota by Prof. 
Hoizinger in 1897 has occurred but rarely in this collection. 
It was found at Black River in the upland woods of the gorge, 
growing on old wood associated with gemmiperous form of 
Earpanthus scut at us and Jamesonievilla autumnalis, —also at 
Wentworth, Wis. It has been found only at higher altitudes 
of the District. At Lutsen it was collected in quantity, grow¬ 
ing on old bare wet logs in deep woods. 
S. nemorosa is not common. It is found sparingly along 
mossy banks of the rock streams. In one locality however, 
at Oneota Cliff, Duluth, Minn., it grows in abundance, covering 
the perpendicular wall of rock to a considerable extent. 
Sumhrosa is the rarest of the Scapaniae in the District. A 
few plants only were found on the cliff one mile up stream 
from Knife River, St. Louis County, Minn. 
8. undulata has been observed but once at Lutsen, growing 
with the rare J. sphaerocarpa on rocks in a small brooklet drain¬ 
ing a cedar swamp. 
67. Radula complanata Dumort. 
No. 573 Copper Creek, Wis., Aug. 5, 1901), on rocks. 
No. 751 Knife River, Minn., Aug. 1, 1909, on trees. 
No. 915 French River, Minn., Oct. 3, 1909, on rocks. 
No. 674 Carlton, Minn., Sept. 26, 1909, on rocks. 
No. 156 Gordon, Wis., Sept. 10, 1906, on cedar trees. 
No. 1197 Lutsen, Cook Co., Minn., Sept., 1911. 
68. Radula obconica Sulliv. 
No. 963 Wentworth, Wis., Oct. 19, 1910, on tree in balsam 
swamp. 
No. 1137 Lutsen, Cook Co, Minn, Sept. 22, 1911. 
69. Porella pinnata. 
No. 958 Carlton, Minn, on rocks, Sept, 11, 1910. 
