107 



Drepanocladus. 



Species impossible to distinguish with a hand Ions only. Leaves 

 serrate, acuminate, Iouk falcate sccund, almost circinatc, plicate. Cap- 

 sule inclined to horizontal. Tufts pale Rrcen, never red or purple, dis- 

 tinctly pinnate, rarely erect, slender. Branches hooked. No paraphyllia. 

 In wet places, not submerged. Mature in spring or summer. 



Entodon. 



The Kenus Entodon only can be described. In color, the plants are 

 glossy yellow green. The habitat ranges from woods, soil or about the 

 base of trees. Leaves are turgid, concave, ecostate or costa very faint, 

 entire or slightly serrate at tip, sometimes flattened. Capsule erect. 

 Mature in aiitumn or winter. The most common form is Enlodon se- 

 duclrix with stems and branches julaceous. 



EURHYNCHIUM. 



This genus closely resembles Brachylhccium. The cell structure, which 

 is one of the differences, can be seen with a microscope. The operculum 

 also varies, for it is mostly very long beaked. 

 E. hians. 



A rather common plant. Soil-loving. Leaves serrate acute to acu- 

 minate. Costate about one third of leaf. Seta rough. Capsule horizontal. 

 A depressed habit. Yellow green. Leaves loose, cordate ovate. Mature 

 in autumn. 

 E. rusciforme. , 



An aquatic plant, almost black green. Large and robust. Leaves open 

 ovate, acute to acuminate. Capsule cernuous, neck short and distinct. 

 Seta smooth. Mats caespitose, floating or pendent. Stem woody and 

 prostrate. Found in brooks. Mature in summer or autumn. 



FONTINALIS. 



Closely resembles Dichelyma, which is costate, while Fontinalis is ecos- 

 tate. Capsule mostly immersed. Plants long, slender, floating, branched, 

 dark green. Leaves distant, flat, sometimes concave. Calyptra conical. 

 Mature in summer. 



Heterophyllum Haldanianum. See Hypnum Haldanianum. 



Hygrohypnum ochraceiim. See Hypnum ochraceian. 



Hylocomium. 



In this genus, recognition of species again depends upon the microscope. 

 The genus is wood-inhabitating, on humus, logs or ground. Leaves costate, 

 serrate, acuminate. Costa single or double, operculum conic to short 

 rostrate. Leaves often bipinnate, plicate, complanatel^- branched or 

 irregularlj' branched. Costa is never percurrent. Paraphyllia present or 

 lacking. Leaves squarrose or spreading, secund, ovate. Capsule ovoid, 

 short, thick, unsymmetric. Seta smooth. Plants form wide loose patches . 

 They are large and robust. Mature in spring. 



Hypnum. 



This is the largest group of mosses, and the form most often collected. 

 They are diflficult to describe because of their great variation in habit and 

 structure. The leaves are sometimes pinnate, sometimes they are secund. 

 Costa is short or double or wanting. In some species the leaves are falcate 



