626 (26) Musci. (mosses.) 



Tribe Vn. TKICH0ST6mE^. 



19. TRICHOSTOMUM, Br. & Sch. (Tab. I.) 



Calyptra cucullifoiin. Operculum conic-rostrate. Capsule oval or cylindri- 

 cal, mostly erect, long-pedicellate. Peristome single : teeth 32, linear, approxi- 

 mate in pairs. Infloi-escence various. — Plants growing on the ground or on 

 stones, of a rather rigid habit ; stems simple or dichotomously divided ; leaves 

 varying from lanceolate to lanceolate-subulate, costate to or beyond the apex ; 

 arcolation loose below, dense and roimdish above. (Name from ^pt|, a hair, 

 and iTTofia, a mouth, in allusion to the capillary teeth of the peristome.) 



1 T. tortile, Schrad. Stems mostly simple, 3" -5" high; leaves lance- 

 olate-subulate, spreading, often subsecund, reflexed on the margin ; costa excur- 

 rent ; capsule cylindi-ical ; operculum shortly rostrate ; annulus simple : dioecious ; 

 male flower terminal. — Eoad-sides, clay-banks : frequent. (Tab. I.) (Eu.) 



2. T. tenue, Hedw. Distinguished from small forms of the last, which 

 it much resembles, mainly by its large double annulus, firmer and brownish-red 

 capsule, and the plane (not reflexed) margin of the leaf. — Pennsylvania, accord- 

 ing to Hedwig. (Eu.) 



3. T. vaginalis, Sulliv. Stems 6" -10" high, slender; stem-leaves 

 erect, appressed, ovate-lanceolate; the perichEetial leaves sheathing, suddenly 

 attenuated, spreading at the apex, the costa strong and excurrent; capsule 

 oval-oblong ; teeth of the peristome short, anastomosing in pairs ; annulus 

 double, veiy large, its width equal to half the length of the teeth ; pedicel slen- 

 der, flesuous; operculum elongated-conic, obtuse; iniiorescence as in No. 1. — 

 Sides of ditches and roads, Pennsylvania and New England. 



4. T. pallidum, Hedw. Stems short, 3" -4" high; leaves long-seta- 

 ceous from a lanceolate base ; costa broad, excun-ent, denticulate at the apex ; 

 capsule oblong-elliptic. — Clayey grounds; frequent. — Conspicuous by its nu- 

 merous, long (l|'-2' high) straw-colored pedicels; monoscious; male flower 

 gemmifonn, in the axils of the upper leaves. (Eu.) 



5. T. g'laucesccns, Hedw. Stems densely ciespitose, 6"- 10" high, 

 fastigiately branched ; lower leaves small, remote, lanceolate ; the upper larger, 

 and croAvded into a terminal tuft, linear-lanceolate, costate to the apex, the jDlane 

 margins denticulate above; capsule oval-oblong; operciilum elongated-conic. 

 Shores of Lake Superior, Agassiz. — Remarkable for the glaucous hue of its 

 foliage. (Eu.) 



20. BARBUL.A, Hedw. (Tab. I.) 



Calyptra cuculliform. Operculum subulate-conic. Capsule oval-oblong or 

 cylindrical, long-pedicellate. Peristome single : teeth 32, very long, filiform, 

 contorted, connected at the base by a short or long tubular membrane. Inflo- 

 rescence various. — In h.abit, ramification, texture, and mostly in the fonn of the 

 leaves, allied closely to Trichostomum : diff"ering chiefly in the torsion of the 

 peristome. (Name a diminutive of harha, beard, in allusion to the capillary 

 peristome.) 



