MUSCI. (MOSSES.) 663 



entire, more or less secnnd ; capsule oval or ovate-oblong, its mouth small ; 

 pedicels 5" - 7 1 ' high ; operculum conic, scarcely rostellate ; inner peristome a 

 granulated grayish membrane, adherent to and bordering the lower half of each 

 tooth, free above, and split into two linear-lanceolate divergent segments, as in 

 Bartramia ; sporules light greenish-yellow, their diameter one half greater than 

 in No. 1. (Ptcrigynandrum intricatum, Hedtv.) Trees and logs; common. 

 (Tab. 18.) 



3. P. velutlna, W. P. Sch. Exceedingly like and formerly confounded 

 with No. 2 ; leaves with fewer quadrate alar cells; capsule cylindrical, its mouth 

 larger ; operculum decidedly rostellate ; teeth of the peristome more closely ar- 

 ticulated, narrowly bordered their whole length by the adherent inner peristome ; 

 sporules dark yellowish-green, granulated, with a diameter twice as great as in 

 the first species. Bark of trees, Columbus, Ohio. 



(P. POLY ANT HA, a common European species, and found in British America 

 by Drummond, has the pcristouie of No. 1, with the capsule and short-conic 

 operculum of No. 2.) 



73. II O I?I A L, O T H E C I U M , Bryol. Europ. (partly.) (Tab. 19.) 



Calyptra cuctilliform, hairy. Operculum conic, subrostellate. Capsule orate- 

 cylindrical, regular and erect, or oblique and incurved, pedicellate, annulate. 

 Peristome double; the exterior 16 linear-lanceolate teeth, with close articula- 

 tions conspicuous on the margins ; the interior 16 short cilia from a plicate base ; 

 or a membrane lining the teeth. Inflorescence monoecious or dioecious. Stems 

 prostrate, closely and pinnately branched ; leaves shining, costate, serrulate, 

 with an oblong-rhomboidal areolation. (Name from 6/toXor, equal, and $17*07, 

 a capsule; applicable to the type of the genus, Leskea sericea, Hedtv.) 



1. H. Sllbcapillittum, Bryol. Europ. Monoecious; leaves elliptical 

 or obovate-elliptical, suddenly acuminated, not striate, serrulate ; costa single or 

 forked, extending half-way ; pedicel rough ; capsule inclined, slightly incurved ; 

 teeth of the peristome dark -red, with a broad pellucid central stripe marked by 

 a delicate zigzag medial line ; inner peristome a membrane lining the teeth. 

 (Ptcrigonium ascendcns, Schwa'gr. Suppl. t. 243. Pt. decumbens, Schiragr. L c. 

 t. 110. Ptcrigynandrum brachycladon, Brid. Bryol. Univ. 2. p. 185.) A small 

 species resembling Pylaisasa intricata, and growing with it on trees: common 

 (Tab. V.) 



74. P L, A T Y G Y B I U ill , Bryol. Europ. ( Tab. 1 9. ) 



Calyptra cuculliform, elongated, slightly spiral. Operculum conic, short-ros- 

 trate. Capsule oval-oblong, erect, pedicellate. Peristome double ; the exterior 

 16 linear-lanceolate broadly margined teeth; the interior 16 filiform cilia, the 

 basilar membrane obsolete. Annulus very large. Inflorescence dioecious. 

 Rather small species, with prostrate closely entangled subpinnate stems ; and 

 oblong- lanceolate ecostate leaves, with a linear areolation. (Name composed 

 of TrXarus, large, and yvpos, ring, referring to the annulus.) 



1. P. repent, Bryol. Europ. Branches short, rather julaceous, ascend- 



