— 95 — 
The temperature on south slopes exposed to, or, at most, but slightly protected 
from, the direct rays of the sun by scattered trees and bushes, was 20° to 25 0 ' 
higher than the above record. 
The effect of such conditions on all forms of vegetation was clearly marked, 
but that shown by the moss flora has been of special interest to the writer. Spring 
fruiting mosses matured very few capsules, and the later forms promptly dried 
up. By the first of June all the moss beds not in places having a constant water 
supply had the appearance usually found in late August or September. This 
dead appearance continued up to and through the winter, and, in some cases, was 
quite noticeable in the spring of 1914. The summer and fall fruiting forms, 
except in most favorable localities, did not fruit in 1913. A noteworthy excep- 
tion to the condition just stated was presented by Leucodon julaceous and Fors- 
stroemia trichomitra, both of which were found fruiting abundantly in exposed 
places in the fall and winter of 1913. 
Frequent examinations of the principal moss areas in the neighborhood 
have been made up to June, 1914. The findings with reference to the commoner 
forms are given below: 
Leucobryum glaucum. A few dead plants found in . most tufts, vigorous- 
growth in 1914. 
Polytrichum commune and P. Ohioense. The patches show 50-75% of 
plants dead, with many others inactive except in the production of new shoots 
from the base. Fruit or sex organs very rare in 1914. 
Dicranum scoparium. Vegetative portions uninjured, fruit scarce, and 
capsules imperfectly formed in 1914. 
Grimmia apocarpa. Uninjured except in the case of tufts on wholly ex- 
posed stones in walls, in which places some patches showed all plants dead.. 
Most tufts show abundant fruit and vigorous growth in 1914. 
Orthotrichum Lescurii. Uninjured and fruiting abundantly in 1914. 
Rhytidium rugosum. Uninjured. 
Dicranella heteromalla. Many dead patches with no new growth in exposed 
places, vigorous growth and abundant fruit where protected in shallow gullies. 
Bartramia pomiformis. Very light crop of sporophytes in 1914, with many 
capsules dwarfed or sterile. Vegetative portions uninjured, but showing only 
slight growth. 
Aulacomnium heterostichum. Uninjured and fruiting abundantly. 
Tree growing species were uninjured almost without exception, although 
Anomodon attenuatus did not fruit and Thelia hirtella produced but few capsules 
in 1913. The lowland forms show the effect of drought by the presence of few 
fruiting or sexually mature plants, which conditions are noticeable again in 1914. 
Of special interest locally is the effect of this dry summer on the two species 
of Polytrichum and on Dicranum scoparium. Already, midsummer, 1914, the 
silky tufts of the Dicranum are prominent among the dead Polytrichum plants 
which almost hid them before. Before the injured forms can regain their vigor- 
ous grow'th the Dicranum will have usurped most of their territory. 
IndianaJLJniversity, Bloomington, Ind. 
