MUSCI. (MOSSES.) 621 



2. DICRANELLA, Schimp. Small species: leaves smooth, more or less serrate 

 at the apex; the areolation unifonn at the base: calyptra not inflated: capsule 

 mostly cernuous, seldom strumose : dioecious. 



4. D. cerviculatuoi, Hedw. Densely caespitose, yellowish-green ; 

 Stems short, 4" -6" high; leaves lanceolate-subulate, serrate at the apex, some- 

 what secund, with a broad costa ; capsule gibbous, short, globose-oval, narrowly 

 annulate, strumose. Bogs, New Jersey, Torrey. (Eu.) 



5. D. vst rill ill, Hcd\v. Stems 4" - 5" high ; leaves lanceolate-attenuated, 

 nearly entire at the apex, patent; costa slightly excurrent; capsule oval or ob- 

 long, more or less oblique and incurved, exannulate ; operculum large, shortly 

 rostrate. Clay-banks, in loose patches : very common: valuable. (Eu.) 



6. D. debilc, Hooker & Wilson. Resembles small forms of No. 5 ; 

 stems 2" -3" high, mostly simple, leaves erect; the lower short, ovate-lanceolate, 

 rather obtuse ; the upper linear-lanceolate, channelled, and with entire reflexed 

 margins, costate to the apex ; capsule oval, erect; operculum with a small conic 

 base, and an erect subulate rostrum as long as the capsule ; peristome small : 

 teeth 2 - 3-cleft half-way, below red, strigillose, the segments scabrous ; annulut 

 veiy large, deciduous, triple ; spores rather large ; pedicel yellow. Clayey soil, 

 Mobile, Alabama ? 



7. I>. rilfescens, Turner. Stem short, gregarious ; leaves reddish, lax, 

 linear-lanceolate, falcate-secund, the margins plane, obscurely denticulate ; areo- 

 lation loose ; capsule erect, oval or somewhat obovate, exannulate ; operculum 

 large, with a short rostrum. Wet clay-banks, Pennsylvania, Lesquereux. Re- 

 sembles No. 5. (Eu.) 



8. D. sub ill;* turn, Hedw. Loosely csespitose; stems 5" -10" high; 

 leaves secund, somewhat falcate, long-subulate from a lanceolate base, entire ; 

 costa predominant ; capsule ovate, gibbous, cernuous, striated when dry ; annu- 

 lus rather large ; pedicel red. White Mts., New Hampshire, Oakes. (Eu.) 



9. D. Eu'teromalluiii, Hedw. Somewhat larger than the last; leaves 

 secund, slightly falcate, lanceolate-setaceous ; costa heavy, vanishing at the sub- 

 denticulate apex ; capsule cernuous or nearly erect, more or less obovate and gib- 

 bous, obliquely plicate when dry ; pedicel pale yellow. Var. ORTHOciRPUM 

 lias an erect cylindrical capsule. Moist ground; very common. (Eu.) 



$3. DICRANUM PROPER. Mostly large species: stems often densely tomentose 

 for their whole length with radiculur Jibres : leaves icith enlarged yellowish and di- 

 aphanous cellules at their basal angles: capsule cernuous or erect. 

 * Monoecious : leaves falcate : capsule cernuous. 



10. I>. Biyttii, Bryol. Europ. Caespitose; brunches fragile ; leaves soft, 

 dull-green, flexuose, rather secund, crisped when dry, the costa slightly excur- 

 rent; capsule oval, when dry stramose ; annulus simple. Alpine and sub- 

 alpine rocks. White Mountains of New Hampshire, Oakes. (Eu.) 



11. D. Starkii, Web. & Mohr. Stems l'-3' long, decumbent at the 

 base ; leaves long, subulate-setaceous from a lanceolate base, secund, not crisped 

 when dry, the costa shortly excurrent ; capsule oblong, gibbous, strumose, stri 

 flted ; annulus double. With the last. (Eu.) 



