Mosses and Lichens 



Seventy-four species are known in all, nineteen in North 

 America. 



Hypnum (Eurhynchium) Boscii, Schwaegr. See Plate 



XXVI. 



Habit and habitat. A very beautiful and easily identified 

 moss, growing in thick soft-golden cushions or in loose thin 



mats on the ground among grass or on 

 the ground and on rocks in shady places 

 and open fields. 



Name. - - The specific name Boscii 

 was given by D. Fridericus Schwae- 

 grichen, in honour of Louis Augustin 

 Guillaume Bosc, a distinguished natur- 

 alist. 



Plants. Stems prostrate, somewhat 

 pinnately branching ; branches mostly 

 simple, inflated, blunt, and cylindrical 

 by the arrangement of the leaves. 



Leaves. Thin, dry and shining, 

 closely overlapping, oblong-oval, very 

 concave ; apex narrowed to a twisted 

 slender point ; base clasping ; margin 

 finely serrate to the base ; cells narrowly 

 linear, those of the base shorter, thick 

 and yellow-brown. 

 Leaves at the base of the pedicel. Narrowly long taper- 

 pointed. 



Habit of flowering. Male and female flowers on the same 

 plant (monoicous}. 



Veil (calyptra). Split up one side. 



Spore-case. Brown, oblong, erect-incurved, gradually nar- 

 rowed into the pedicel, strongly arched under 

 the mouth when dry. 



Pedicel (seta). Smooth, red to red-brown, 

 slightly twisted to the right. 



Lid (opercnluni). Conic, the beak about 

 i the length of the urn. 



Teeth (peristome}. As in the genus 

 Hypnum. 



Annulus. Compound. 



Lid. 



Spore-cases. 

 H. Boscii. 



H. Boscii. 

 Breathing pore. 



29O 



