282 A MANUAL OF MOSSES 



the mouth, smooth ; annulus broad, 3-seriate ; lid high-convex 

 conic-acuminate; peristome hypnoid, teeth orange-yellow be- 

 low, paler above, segments somewhat carinately split, cilia 2 

 slender and about as long as segments ; spores mature in late 

 spring or early summer. 



On earth, decaying wood, stones, etc., bordering streams 

 or in wet situations in the shade, mainly in hilly or moun- 

 tainous regions almost the world ov^r ; in North America from 

 Arctic regions south to the Gulf States. Not common in 

 our region. 



Cambria : T. P. James. (Porter's Catalogue). 



Huntingdon : T. C. Porter. (Porter's Catalogue). 



2. Drepanocladus kneiffii (Schimper) Warnstorf. 



(HypHum aduncum var. kneiffii Schimper; Ainblystegium 

 kneiffii Bryologia Europasa). 



Stems slender, long, filexuous, prostrate or ascending, more 

 or less pinnately branched, the cross-section showing a central 

 strand, but not a distinct cortical layer of enlarged hyaline 

 cells ; leaves distant, narrowly lanceolate, costate to the middle 

 at least, not secund, not falcate except sometimes at the end of 

 the branches, the acumen flat and entire, the upper leaves 

 usually shorter and wider; basal leaf-cells much as in D. unci- 

 nates, the alar somewhat larger and more inflated and extend- 

 ing to the costa. Closely related on the whole to D. tmcinatus, 

 and by some bryologists regarded as merely a variety of that 

 species. 



Along streams and ditches, about as widely distributed as 

 the preceding species but not yet reported from our region. 



3. Drepanocladus fluitans [Linnaeus] Warnstorf. 

 (Hypnuin fluitans Linnseus; Amblystegiunt fluitans DeNotaris). 



Loosely and softly cespitose, yellowish to dark brown, ir- 

 regularly to regularly pinnately branched: leaves more or 

 less secund or falcate, narrowly lanceolate to oblong-lanceolate, 

 tapering gradually into a very slender flexuose acumination, 

 the branch-leaves somewhat narrower than the stem-leaves but 

 quite similar, all denticulate, excavate at the base, sometimes 

 reaching a length of 4 mm., decurrent; costa not markedly 

 wide, reaching into the apex or at least nearly so; leaf-cdls 

 about 20-30:1, long, reaching to .100 mm. or more, pointed, 

 narrow, somewhat incrassate, the alar enlarged, hyaline or 

 colored and forming more or less distinct auricles reaching 

 sometimes to the base of the costa, somewhat inflated: seta 

 long, up to 5 or 6 cm. or sometimes much longer, flexuous, 

 strongly dextrorse ; capsule more or less inclined, curved, rather 

 thin-walled, with a distinct collum, about 3-4 :1 ; lid high-con- 

 vex, bluntly apicualte ; peristome-teeth rather short, segments 



