630 musci. (mosses.) 



Tribe X. TETRAPHIDE^E. 



26. TETKAPHIS, Hedw. (Tab. 16 ) 



Calyptra mitriform, large, irregularly plicate, lacerate at the base. Opercu- 

 lum acutely conic. Capsule subcylindrical, long-pedicellate. Peristome single : 

 teeth 4, three-sided, elongated-pyramidal, longitudinally striated on the back, 

 not articulated. Inflorescence monoecious : male flower gemmiform, terminal. 

 — Perennial, growing on much decayed wood ; stems slender, simple or branched, 

 often bearing at their apex leafy cup-shaped receptacles filled with lentiform 

 pedicelled gemma} ; leaves ovate-lanceolate, 3-ranked, costate, with an hexag- 

 onal-rotund areolation. (Name from rerpa, four, and (pvs, produced.) 



1. T. pelSilcMss, Hedw. Stems ^'-1' high, closely tufted, reddish be 

 low, light green above. — Woods; common. (Tab. 16.) (Eu.) 



27. TETRODOKTIUM, Schwtegr. 



Calyptra large, mitriform, plicate, laciniate at the base, sometimes split on 

 one side to the apex. Operculum conic. Capsule oval, exsertly pedicellate. 

 Peristome as in Tetraphis, but the teeth shorter. Inflorescence monoecious : 

 male flower gemmiform, terminal. — Minute bulb-like annuals, growing upon 

 rocks (differing from Tetraphis chiefly in habit and structure of the foliage), 

 with closely imbricated ovate-lanceolate scarcely costate leaves, rooting at the base 

 and throwing out leafy flagelliform branchlets, or long Iinear-clavate frondose pro- 

 cesses, sometimes trifid at the apex. — (Name from rerpa, four, and o§coi>, tooth.) 



1. T. repsaBidMiia, Funk. Frondose processes very rare; pedicel 3"- 

 5" high ; mouth of the capsule repand or notched between the teeth. — Damp 

 shaded situations, on the ground near the " Glen House," Gorham, White 

 Mountains of New Hampshire, James. (Eu.) 



Tribe XI. ENCALYPTEiE. 



2§. EKCALYPTA, Schreber. (Tab. 16.) 



Calyptra large, cylindrical-campanulate, longer than the capsule, subulate- 

 rostrate, uneven or fringed at the base. Operculum conic, with a long slender 

 subclavellate rostrum. Capsule elongated-ovate-cylindrical, long-pedicellate. 

 Peristome variable, cither absent, single or double. Inflorescence monoecious or 

 dioecious. — A well-marked genus, approaching in habit and mode of growth 

 the larger species of Barbula. — (Name from evKaXvnros, covered with a veil, 

 in allusion to the remarkably large calyptra.) 



1. E. caliata, Hedw. Stems V-\' high, thick, radiculose, simple or 

 sparingly branched ; leaves rather large, crowded, recurved-spreading, oblong- 

 ovate or ligulate, shortly acuminate, slightly concave, rather undulate on the 

 margin, somewhat crenulate near the apex ; areolation dot-like, granulose above, 

 enlarged oblong and diaphanous below ; costa excurrent into a short point ; per- 

 istome single, with 16 lanceolate distantly articulated teeth, without a medial 



