Musci. (mosses.) (21) 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>. cervicill^tuin, Hedw. Densely c^spitose, yellowish-green; 

 stems short, 4" -6" high; leaves lanceolate-subulate, serrate at the apes, some- 

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

 annulate, stramose. — Bogs, New Jersey, Torrey. (Eu.) 



5. I>. varillBM, Hedw. Stems 4" - 5" high ; leaves lanceolate-attenuated, 

 nearly entire at the apes, patent ; costa slightly escurrent ; capsule oval or ob- 

 long, more or less obUque and incurved, esannulate ; operculum large, shortly 

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



6. I>. (lebile, Hooker & Wilson. Eesembles 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 rostmm as long as the capsule ; peristome small : 

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

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

 Mobile, Alabama 1 



7. ©. I'HfeScens, Turner. Stem short, gregarious ; leaves reddish, las, 

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

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

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

 sembles No. 5. (Eu.) 



8. D. Sll'bula.tum, Hedw. Loosely csespitose; stems 5"- 10" high; 

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

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

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



9. D. lietei-omallum, Hedw. Somewhat larger than the last; leaves 

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

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

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

 has an erect cyhndrical capsule. — Moist ground; very common. (Eu.) 



§3. DICEANUM Propek. — Mostly large species: stems often densely tomentose 

 for their whole length ivith radicular fibres : leaves with enlarged yellowish and di- 

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

 # Monoecious : leaves falcate : capsule cernuous, 



10. D. Blyttii, Bryol. Europ. Csespitose; branches fragile ; leaves soft, 

 dull-green, flesuose, rather secund, crisped when dry, the costa slightly escur- 

 rent ; capsule oval, when diy strumose ; 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, stntmose, stri- 

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



