224 A MANUAL OF MOSSES 



Mostly on bases of trees, rarely on rocks, occurring in Asia 

 and from Connecticut to the Mississippi River and south to 

 Florida. Apparently rare in our region. 



AIcKean : Lewis's Run, Bradford, November 24, 



1895, and Limestone Creek, Bradford, De- 

 cember, 1896. D. A. B. (Figured). The 

 latter issued a? Grout's No. 134, North 

 American Musci Pleurocarpi. 



2. HNTODON C. Mueller. 



Autoicous, rarely dioicous : green to golden-brown : stem 

 prostrate to ascending, complanate-leaved, rarely julaceous, 

 thickly pinnately branched, mostly short, simple, ascending or 

 spreading ; stem-leaves compressed, slightly decurrent, con- 

 cave, the dorsal and ventral imbricate, the lateral spreading, 

 oval, from an ovate base obtuse or aplicnlate or rarely slender- 

 ly acuminate, entire or apically serrate ; costa double and very 

 short, or none; leaf-cells narrowly linear, smooth, the basal 

 lax and incrassate, the alar laxly quadrate, forming a distinct 

 hyaline group : seta mostly 1-3 cm. long, red or yellow, twisted 

 when dry ; capsule erect, straight or \veakly curved ; collum 

 short; annulate or exannulate ; teeth inserted below the mouth, 

 lance-linear, acuminate, thin, plane, mostly non-margined, 

 orange to castaneous, distantly articulate, mostly low-trabecu- 

 late ; inner peristome without prominent basal membrane, seg- 

 ments linear, carinate, yellow, as long as or shorter than the 

 teeth, cilia none; spores .012-.020 mm. 



Nearly 150 species, on trees and on calcareous rocks, in 

 temperate and warmer regions ; about 33 species occurring in 

 North America ; 4 or 5 species in our region. 



Key to the Species. 



a. Leaves narrowly gradually acuminate. (,. brcrisctits (H. and 

 a. Leaves acute or abruptly acuminate-apiculate. W. ) Jaeg.) 



b. 

 b. Leaves entire or almost so; only the alar cells quadrate or 



rectangular. c. 



b. Leaves serrulate; all basal cells rectangular. 



(. siillk'antii (C. M.) 



Lindb.). 

 o. Teeth with more than twenty articulations: leaves acute, but not 



apicnlate. 1. E. coinpressits. 



c. Teeth with less than twenty articulations, d. 



d. Leaves acuminate-apiculate: teeth 15-20-articulate: capsule 



less than 4.5:1. 2. E. cladorhisans. 



d. Leaves abruptly apiculate: teeth less than 10-articulate; capsule 

 about 5:1. 3. E. scdnctri.r. 



1. Entodon compressus C. Mueller. 

 (Cylindrothecinm comprcssnin Bryologia Europaea). 



Widely and flatly cespitose, glossy yellow-green, with much- 

 compressed stems and branches : considerably more slender than 



