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 (operculuni). Conic, the beak about 

 the length of the urn. 



Teeth (peristome). As in the genus 

 Hypnum. 



Annulus. Compound. 



Lid. 



Spore-cases. 

 H. Boscii. 



H. Boscii. 

 Breathing pore. 



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