— io8 — 
simple and branching 1 filaments resembling prothallia occur in the axils of 
the leaves. These structures are fully treated by Correns (Vermehrung der 
Laubmoose, p. 97-101 : 1899.) mostly under E. contorta as those of E. procera 
are essentially the same. Comparing three collections made at Lockport, 
August and November, 1904, and June, 1905, I find them most abundant on 
the November plants, least on the June, seeming to increase as the season of 
growth advances, and as Correns states, ripening in the fall. They are 
mostly found above the middle of the stem, but not quite to the top in the 
freshly growing part. They are generally branched or forked, single or in 
tufts, the lower part smooth, brown or chestnut, divided by rather distant 
oblique partitions, the upper or propagative part comprising the brood-body 
chlorophyllose, papillose, the partitions vertical to the outer wall. The 
partitions plainly show that they are transformed rhizoids though short 
simple ones may be chlorophyllose almost from their origin, the brown por- 
tion very slight. They spring from the stem and the basal part of the costa. 
None have been observed on the lamina. The cells of the papillose part are 
mostly longer than wide commonly 25 /4 long by 22-3 oju in diameter, but vary- 
ing between 20-80 x 20-55/4. Rhizoids which function as such may spar- 
ingly branch from the propagula but are much smaller, 5-6/4 in diameter. 
In E. contorta as described by Correns, the propagula are produced only 
on the stem. His efforts to produce theta on the leaves by cultivation met 
with little success, a few threads being sometimes developed on the sheath- 
ing base of young leaves, but none on the lamina. When considering E. 
procera he quotes Berggren to the effect that portions of the leaves of this 
species “readily develope protonema when brought into favorable positions.” 
He concludes with the statement that “of these two nearly related species 
the monoecious (A. procera ) is better provided for asexual multiplication than 
the dioicous (A. contorta.)" This seems to be borne out by the specimens 
from Lockport as the propagula are not confined to the stem as in E. contorta. 
The moss on Presque Isle was found in fissures on the north face of a 
cliff or wall of magnesian rock, a dolomite in composition. Those at Lock- 
port grow on the east face of a low cliff of magnesian linestone, dolomitic in 
character. A little cushion was found in a shallow depression of the vertical 
face at the base of a tuft of Pellaea atropurpnrea, another on the edge of 
tne cliff where some soil had accumulated and was associated with Reboulia 
hemispherica : a considerably larger tuft on a narrow ledge with a thin soil, 
mixed with Brachythecium acuminatum rupincolum. These plants like 
the mosses at Presque Isle show the general character of its associates. The 
habitat is shady but not moist or only slightly so, more commonly dry. Roth 
gives the habitat of E. procera as “shaded schistose rocks.’’ It is usually 
mentioned as growing in moist places as well as Myurella Cary ana and 
Distichium capillaceum. But the latter occurs in dry situations also. The 
associates at Lockport are in general xerophytes, though both Reboulia and 
the Brachythecium likewise occur as mesophytes. 
The discovery of E. procera at the two places, Presque Isle and Lock- 
port, south of their usual range, is at first view a little surprising. On the 
