Musci. (mosses.) (63) 663 



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

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

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

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

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

 in No. 1. — (Pterigynandrum intricatum, iTec^zw.) — Trees and logs; common. 

 (Tab. IV.) 



3. F, velntina, W. P. Sch. Exceedingly like and fonnerly 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 yeUowish-green, granulated, with a diameter twice as great as in 

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



(P. poltAntha, a common European species, and found in British America 

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

 operculum of No. 2.) 



73. HOMAIiOTHECIUM, Biyol. Europ. (partly.) (Tab. V.) 



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

 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 phcate 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/LiaXoy, equal, and 6rjKr], 

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



1. H. SUbcapillatum, 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. — 

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

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

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

 (Tab. V.) 



74. P I. AT YGYRIUITI, Bryol. Europ. (Tab. V.) 



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 veiy large. Inflorescence dicEcious. — 

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

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

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



1. P. repens, Bryol. Eiurop. Branches short, rather julaceous, ascend- 



