992 Wisconsin Academy of Sciences, Arts } and Letters . 
No. 551 Copper Creek, Wis., Aug. 5, 1909. 
No. 1014 French River, Minn., Oct. 3, 1909. 
No. 1187 Lutsen, Cook Co., Minn., Sept. 22, 1911. 
16. Jungermannia sphaerocarpa Hook 
No. 1155 Lutsen, Cook Co., Minn., Sept. 20, 1911. 
1@. Jamesoniella autumnalis (DC) Steph, 
No. 607 Billings Park, Superior, Wis., Nov. 14, 1909. 
No. 410 Solon Springs, Wis., Oct. 1907. 
No. 594 Copper Creek, Wis., Aug. 5, 1909. 
No. 242 Albert, Minn., Aug. 1906. 
No. 447 Woodland, Duluth, Minn., May 30; 1909. 
No. 848pp Knife River, Minn., Aug. 1, 1909. 
No. 2002 Lutsen, Cook Co., Minn., Sept. 1911. 
Jungermannia pumila loves the rocks in streams on the shady 
side and grows on the bare rocks without soil where it can occa¬ 
sionally he wet with spray. The rhizoids penetrate deeply the 
minute crevices of the fractured rocks. The under side of 
over-hanging shady cliffs, or little caves close to the waterline 
are often covered with this tiny plant in a thin tracery of dark 
green. It is almost impossible to remove the plant from the 
substratum. 
J ungermannia lanceolata is found in the usual habitat, old 
rotten logs in shade and moisture with other mosses. It is 
rarely collected in the sterile condition because of its similarity 
to Jamesoniella autumnalis . When the purse string puckered 
perianth of the species is present it can be distinguished at a 
glance. Jamesoniella autumnalis is one of the most common 
of the hepatics in the District. Its perianth is so persistent and 
it fruits so freely that it is recognized with little difficulty. It 
adapts itself to a great variety of habitat and therefore is more 
or less variable. When it grows on the ground in full exposure 
to the sun the leaves are apt to be imbricated, and tinged a red 
wine color. The plants growing on old birches, now freely 
exposed to sun and winds have much reduced leaves resembling 
an Odontischisma ; while those growing in deep woods on old 
logs with plenty of moisture expand to luxurious size. Such a 
variety of form is puzzling to the beginner, and is exceeded by 
