060 MUSCI. ' (MOSSES.) 



67. CL.ASJHATODON, Hook. & Wils. (Tab. 19.) 



Calyptra cuculliform. Operculum conic-rostellate. Capsule oval, erect, pedi- 

 cellate. Peristome single : teeth 16, short, 1 - 2-divided into irregular segments, 

 remotely articulated. Annulus large, imperfect, somewhat persistent. Spores 

 large. Inflorescence monoecious. Very small species, with creeping, entan- 

 gled, irregularly branched stems, and broadly ovate-acuminate serni-costate 

 leaves, of an oval-elliptical areolation. (Name from jcXatr/za, a fragment, and 

 odcoi/, tooth, descriptive of the peristome.) 



1. C. parvulus, (Hampe,) Hook. & Wils. Leaves concave, patent, 

 reflexed on the margins below, acute or obtuse ; areolation of the basal angles 

 quadrate ; mouth of the capsule small ; operculum variable in the length of the 

 rostrum. (Pterigonium marginatum, Schweinitz (not Michaux). Leskea par- 

 vula, Hampe. L. Sullivantii, Bryol. Europ.? Anisodon tenuirostris, Bryol. 

 Europ. Clasmatodon pusillus, Hook.fr Wils.) On the bark of trees, in diy 

 places, or on their roots in localities subject to inundations : very common in the 

 Southern States. A variable species. (Tab. 19.) 



TRIBE XXVIII. T RELIEVE. 



68. Tilt LI A, Sulliv. 



Calyptra cuculliform, narrow. Operculum conic, rostrate. Capsule ovate- 

 cylindrical, erect, pedicellate. Peristome double; the exterior 16 long, linear- 

 subulate, white, granulated, distantly articulated teeth; the interior a carinate 

 membrane extending to the length of the teeth, with or without rudimentary 

 cilia. Growing in compact glaucous- or yellowish-green mats ; stems villous, 

 with a radicular tomentum, creeping, throwing up densely crowded short and 

 terete branches, clothed with deeply concave closely imbricating deltoid-ovate 

 slenderly pointed leaves, composed of pellucid elliptical and conspicuously uni- 

 papillate cellules. (Name from $77X77, a papilla, referring to the prominent pa- 

 pillae of the leaf.) 



1. T, Ilirtellil, (Hedw.) Sulliv. Leaves inclining to a dark yellowish- 

 green, obsoletely semi-costate, ciliate-dentate on the margins, strongly Dapillose 

 on the back, the papillae elongated, curved, simple ; pericha3tial leaves fringed. 

 (Pterigynandrum hirtellum, Hedw.) Roots and trunks of trees in woods; 

 common. 



2. T. asprclla, (Schimp.) Sulliv. Growing with No. 1, formerly con- 

 founded with it; distinguished by the glaucous-green color of its leaves, their 

 papilla) 2-lobed at the apex ; and by the narrower, longer, and nodose teeth of 

 the peristome, and smaller sporules. (Leskea asprella, W. P. Sch.) Northern 

 and Middle States, and westward. 



3. T. Lescurii. Sulliv. (Muse. Bor.-Amer., No. 249.) Near the last 

 species ; ramification more fasciculate, not so condensed ; the branches longer ; 

 leaves glaucous-green, with a bluish tinge, shorter, broader, not so acuminate, 

 the areolation much smaller, not so pellucid, the papillse 3-lobed at the apex ; 

 pedicel twice as long ; capsule longer, often slightly curved, the mouth with a 



