Conklin—Preliminary Report on a Collection of Hepaticae. 995 
L. attcnuata usually called ubiquitous in places where it oc¬ 
curs, is far from omnipresent in this District. It was found 
once in limited quantity growing with Sphenolobus Hellerianus, 
Sphenolobus exsedus, and S. exsect aeformis on' old wood at 
French River, Minnesota. At Lutsen, Cook County, it is more 
common and grew mixed with mosses on old logs in a cedar 
swamp. 
L. barbata and L. Lyoni are very common on damp rock in 
deep shady ravines along the water ways. Both are often found 
growing in pure colonies in dense mats and fruiting freely. 
L. incisa is readily detected by its vivid green color and the 
usual powdery gemmiperous condition of the leaves. At Lut¬ 
sen the wood paths through cedar swamps were vivid green with 
large patches of this beautiful hepatic. The substratum is 
usually very rotten wood even when growing on the ground. 
It is frequently found: on old logs in wet swamps. 
Of the Muelleri group three very interesting species ; L. 
heterocolpa (Thed.) M 1 . A. Howe, L. Muelleri (ISTees) Dumort, 
and L. Kaurini (Limpr.) Steph. occur in the District. 
About two years ago a few plants were found, resembling a 
slender form of Lophooolea heterophylla which had bifid un¬ 
derleaves and gemmiperous branches with strangely modified 
leaves. It was finally referred to the genus Lophozia until it 
could be collected again in quantity. About a year later Dr. 
Evans saw the slide mount of the plants and determined it L 
heterocolpa (Thed.) M. A. Howe, the Jungermannia Wat- 
tiana Aust. of Gray’s Manual. Since then it has been largely 
collected in all the rocky streams of both the north and south 
ranges at Copper Creek and Black River, Wisconsin; Carlton, 
Knife, French and Lester Rivers and northward in Minnesota. 
It favors mossy rock ledges at the lower levels. It is easily 
recognized by the usual gemmiperous condition. The habitat 
is similar to Plagiochila asplenioides, the form that effects the 
wet banks along streams, and not the robust form of that species 
which clings with its firmly rooted radicles, in patches to per- 
pendicular rock walls below the water falls of the higher alti¬ 
tudes. 
