THE AMERICAN BOTANIST. 13 



find several varieties of mosses but only the few following 

 varieties were found : 



Orthotrichum Ohioense S. & L. was found growing in 

 its characteristic dense yellowish-brown to greenish-brown 

 patches at the base of the trunks of the trees, especially where 

 the trees stood somewhat apart. The plant is rather difficult 

 to identify without the calyptra being present ; but the genus 

 includes many of those species commonly found on the bark 

 and at the base of trees. 



Dicranella heteromalla (L) was found along the shady 

 and somewhat sandy bank of the stream. This is easily iden- 

 tified by its yellowish seta, which becomes darker and twisted 

 with age and the oblong to oblong-ovoid calyptra which be- 

 comes brown and furrowed when dry and empty. 



Milium sp. was also found. These three species were all 

 the acrocarpus species gathered from that locality. 



Among the pleurocarpus mosses were: 



Thuidium recognituni (Hedw.) the common fern moss 

 which was found growing on some of the rotten logs. This 

 moss gets its name from the method of its branching which 

 closely resembles that of a fern pinna. It is one of our most 

 beautiful and delicate Illinois mosses. 



Hypniim imponens (Hedw.) was found growing in the 

 characteristic prostrate attitude in dense mats on rotten wood 

 in shady places. This species is quite dark green in color with 

 capsules nearly erect and symmetrical. 



Amblystegium serpens (L. ) the common creeping hyp- 

 num was more or less common on rotten wood in the shadier 

 places. The whole plant forms but a thin covering over the 

 rotten wood upon which it is found. 



Other species of pleurocarpus mosses were also found but 

 the writer has been unable to identify them on account of the 

 specimens at hand having no fruiting forms present. 



Univ. of Illinois, Urhana. III. 



