ORDER III. BRYALES (True Mosses) 



ACROCARPI 



The acrocaq)ous mosses are generally erect and 

 often not branched; or, if slightly branched by fork- 

 ing, usually with only two or three branches. The 

 fruit is borne at the tip of the stem, or of a well- 

 developed branch, sometimes appearing lateral by the 

 new growth of the plant. 



Family DICRANACEAE 



A very large family containing many genera and 

 several hundred species. 



I. TREMATODON Michx. (Tre-mat-o-don) 



A genus containing a number of species; one of 

 which, Trematodon ambiguus (Hedw.) Hornsch., 

 occurs especially in the northern part of 

 our range. Name derived from the Greek 

 for "perforated" and ''tooth," referring 

 to the teeth of the peristome. 



Plants growing close together in old fields, 



in wet, swampy places, or on damp, clayey 



soil; light green or brownish; fruiting abun- 

 1 ,, , Trematodon 



dantly; not common. ambisuus 



Stems erect, short, usually less than ^2 inch Leaf and capsule 



long. enlarged. 



