musci. (mosses.) S63 



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

 pedicels 5" -V 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 

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

 in No. 1. — (Pterigynandrum intricatum, Hedw.) — Trees and logs; common. 

 (Tab. 18.) 



3. E*. velMtaaasa, 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. roLYAMii.v, a common European species, and found in British America 

 by Drummond, has the peristome of No. 1, with the capsule and sbort-conic 

 operculum of No. 2.) 



73. 1SCMALOTIIECIUM, Bryol. Europ. (partly.) (Tab. 19.) 



Calyptra cuculliform, hairy. Operculum conic, subrostellate. Capsule ovate- 

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

 Peristome double; the exterior 1G linear-lanceolate teeth, with close articula- 

 tions conspicuous on the margins ; the interior 1G short cilia from a plicate base ; 

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

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

 with an oblong-rhomboidal areolation. — (Name from ofiaXos, equal, and 8)']Krf, 

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



1. H. sa«5>cag*i!!sE$iaagl, Bryol. Europ. Monoecious; leaves elliptical 

 or obovate-e'.liptical, 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. — 

 (Pterigonium ascendens, Schwfegr. Suppl. t. 243. Pt. decumbens, Schwcegr. I. c. 

 t. 110. Pterigynandrum brachycladon, Brid. Bryol. Univ. 2. p. 1S5.) — A small 

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

 [Tab. V.) 



74. PLATYGYRIUM, Bryol. Europ. (Tab. 19.) 



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 7t\o.tvs, large, and yvpos, ring, referring to the annulus.) 



1. P. l'epcns, Bryol. Europ. Branches short, rather julaceous, ascend- 



