122 Cheney and Time—Flora of Madison and Vicinity. 
Ceratodon, Brid. 
772. C. purpureus , Brid. 
On the ground. Common everywhere. 
Leptotrichum, Hampe. 
773. L. tortile , Muell. 
On ground and on sandstone faces at Merrill 
Springs. Not common. 
774. L. tortile , Muell., var. pusillum , Schimp. 
On ground at Experiment Station Farm. 
Desmatodon, Brid. 
775. D. arenaceus , Sulliv. & Lesq. 
This species occurs in abundance on the rock ex¬ 
posures about Lake Mendota. It was collected at 
the northwest extremity of Lake Kegonsa, and 
from the old exposures at the quarries west of 
Madison. Local. 
Barbula, Hedw. 
776. B. unguiculatci , Hedw. 
On ground, very common, especially in low, moist 
soil. 
777. B. fallax , Hedw. 
This moss grows with Desmatodon arenaceus and 
was collected in all localities from w T hich that 
species was obtained. It was obtained, also, from 
old tombstones in Forest Hill cemetery. Local. 
778. B. rnucroni folia, Bruch & Schimp. 
Forming cushions on ground in open woods. Near 
Mendota Heights; at Second Point; also at the 
lake shore east of Lakeside, and along the north¬ 
west shore of Lake Kegonsa. Not rare. 
Grimmia, Ehrh. 
779. G. apocarpct , Hedw. 
On limestone west of Madison; not common. 
780. G. plaqiopoda . Hedw. 
Not rare on granitic boulders along C. M. & St. 
P. R. R. near Stevens’ quarries. 
