MUSCI. (mosses.) 621 



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

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

 mostly cernuous, seldom strumose : dioecious. 



4. i>. cervicuiutuill, Hedw. Densely ciespitose, 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. S3. VitriMin, Hedw. Stems 4" -5" high; leaves lanceolate-attenuated, 

 nearlv 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 : variable. (Eu.) 



6. I>. debile, 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-eleft half-way, below red, strigillose, the segments scabrous; annulus. 

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

 Mobile, Alabama 1 



7. S3. rulcSCesfiS, 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. S3. SUbuir&tuill, 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. S3, lieterdmallum, 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. ortiiocarpum 

 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 radicular fibres: leaves with enlarged yellowish and di- 

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

 # Monoecious : leaves falcate : capsule cernuous. 



10. S3. ISIyttis, Bryol. Europ. Csespitose; branches fragile ; leaves soft, 

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

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

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



11. S3. Stai'kli, 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- 

 ated ; annulus double. —With the last. (Eu.) 



