108 



or circinate. Capsule mostly curved or inclined. Seta smooth. Plants 

 form prostrate, often loose, mats. 



Hypnum {Pliliiim) Crista-caslrensis. 



Leaves serrate, acuminate, entire at base. Capsule large, horizontal, 

 curved. Plants large, robust, bright yellow-green, plume-like. One of 

 our most attractive mosses. Leaves complanate. Stems erect or as- 

 cending, recurved at apex. Mature in summer. Found in ricli moist 

 places, in ravines and moist woods. 



Hypnum (Helerophyllum) Haldanianum. 



A common form in deep woods, forming loose mats on decaying wood 

 or humus. Dark yellow green. Stems long. Branchlets distant. 

 Leaves faintly costate, acuminate, imbricate, concave, oblong ovate. 

 Capsule suberect or inclined. 



Hypnum (Stereodon) imponens . 



Leaves strongly falcate secund, pinnate, plumose, ovate lanceolate. 



Costa short double or lacking. Leaves imbricate. Capsule suberect or 



• inclined. Plants prostrate, forming densely interwoven mats of a golden 



green color. The golden color of the basal cells can be seen with a hand 



lens. Mature in autumn or winter. 



Hypnum (Ctenidium) molluscum. 



Leaves serrate, acuminate, pinnate, plumose, golden green, falcate 

 secund, narrowly lanceolate, auriculate at base, decurrent. Costa short 

 double or lacking. Leaves densely imbricate, undulate at apex. Capsule 

 subhorizontal, thick, short. Seta thick. Plants form wide feathery 

 tufts. Mature in spring. 



Hypnum {Stereodon) Patientiae. 



Leaves ecostate or costa very faint, entire, acuminate, falcate secund. 

 Apex serrulate, not cordate, decurrent not crowded, often imbricate. 

 Capsule plicate. Plants form large yellow-green tufts; those in water 

 are black. Plants erect or irregularly branched, often prostrate with 

 ascending branches which are often hooked. Mature in spring. 



Hypnum {Raphidoslegium) recurvans. 



Capsule cylindric inclined. Leaves acuminate, falcate secund, ovate 

 lanceolate, serrate above, close imbricate. Capsule unsymmetric. Oper- 

 culum strong beaked. Stems prostrate. Plants yellow green, glossy. 

 Found at the base of trees and on old logs. Mature in winter. 



Hypnum {Stereodon) reptile. 



Leaves strongly falcate secund with bristly points, ovate lanceolate, 

 margin revolute. Capsule subcylindrical, suberect. Plants small dark 

 green, pinnately branched, appearing julaceous. Mature in summer. 



Leucodon. 



This genus is found on trees above the base. Leaves ecostate, almost 

 entire, slightly serrate at apex, acute. Calyptra cucullate, operculum 

 conic to short rostrate. Capsule ovoid to subovoid, erect. Leaves con- 

 cave. Margin recurved, spreading when moist, decurrent, julaceous when 

 dry. Main stems slender, filiform, erect, stolonif erous , densely leaved. 

 Mature in winter. The two most common forms are L. julaceus and L. 

 sciuroides . These differ in that, in julaceus the leaves are short acuminate 

 and ovate, while in sciuroides they are acuminate. 



