C32 musci. (mosses.) 



costate, plane on the margins ; areola? above guttulate ; below, enlarged oblong. 

 (Name from £vyo'y, a pair, and 68d>v, teeth, in allusion to the paired teeth} 



1. Z. ILappoilicus, Br. & Sch. Stems ^'-l'high, radieulosc ; leaves 

 spreading, crisped when dry ; capsule scarcely exserted, 8-ribbed ; peristome 

 none : monoecious ; male flower gemmiform. — Bocks, on the White Mountains 

 of New Hampshire, Oakes: Alleghany Mountains of Pennsylvania, Lesquereux. 

 (Tab. 16.) (Eu.) 



2. Z. ftloilgcotii, Br. & Sch. More elongated and branched than No. 



1 ; differing chiefly in its narrower and less concave perichsetial leaves twice as 

 long, the longer rostrum to the operculum, and the dioecious inflorescence. — 

 With No. 1, in similar places, according to Mr. Th. P. James. (Eu.) 



3. Z. KM1I ivj's SB tii, Mull. Stems 1'- 2' high, slender, with long filiform 

 branches ; leaves subsquarrose from an erect half-clasping base, complieate-con- 

 cave ; the margins below recurved, above plane and strongly serrate ; fruit 

 unknown. — (Syrrhopodon cxcelsus, Sulliv. Muse. Alleghan., No. 170.) — North 

 Carolina; on rocks, top of Grandfather Mountain, Gray $• Sullicant: Black 

 Mountain, Lesquereux. 



31. BRUMMONDIA, Hook. (Tab. 16.) 



Calyptra large, cuculliform, rostrate, slightly plicate at the base, and papillose 

 at the apex. Operculum obliquely long-rostrate from a convex base. Capsule 

 globose-oval or slightly obovate, exsertly pedicellate. Peristome single : teeth 

 16, very short, truncate. Inflorescence dioecious: male flower gemmiform. — 

 Perennial, growing on trees ; stems prostrate, throwing up numerous short 

 branches, bearing fruit on their summit ; leaves oblong, costate ; areola; minute, 

 roundish. — (Named after the late Thomas Drummond, who made extensive and 

 very valuable collections of North American Mosses.) 



1. E>. clavollfata, Hook. Stems 2'-4' long, creeping, densely covered 

 with radicels ; branches crowded, erect, 2" -3" high; leaves close, erect-patent, 

 shortly acuminate ; costa ceasing with the apex. — Grows in deep-green and close 

 thin mats (3' -10' in diameter), on the bark of trees (particularly the Beech), 

 Northern, Middle, and Western States. (Tab. 16.) 



Tribe XIII. ORTHOTRICHE^. 



32. OeTHOTBICHlM, Hedw. (Tab. 16.) 



Calyptra large, campanulate, longitudinally plaited, crenate-lacerate at the 

 base, hairy or glabrous. Operculum short, conic, rostcllate. Capsule pyriform, 

 more or less elongated, apophysate, pedicellate, immersed or exserted, 8 or 16 

 striated, ribbed when dry. Peristome single or double, rarely wanting; the 

 outer 16 teeth, with a medial line, mostly in pairs (often reflexed when dry); 

 the inner 8 or 16 cilia. Inflorescence monoecious or dioecious : male flower 

 gemmiform. — Perennial plants, growing in roundish cushion-like tufts, en trees 

 oi rocks, never on soil; stems usually erect, simple or branched by innovations, 

 fertile at their summit ; leaves crowded, elongated, costate nearly to the point, 



