OGO MUSCI. (mosses.) 



67. CLASMATODON, 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 semi-costate 

 leaves, of an oval-elliptical areolation. — (Name from Kkdafia, a fragment, and 

 6t>u>v, tooth, descriptive of the peristome.) 



1. C. g)£irvulus, (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. — (Ptcrigonium marginatum, Schweinitz (not Michaux). Leskea par- 

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

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

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

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



Tribe XXVIII. THELIE^). 



68. THE LI A, Sulliv. 



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

 cylindrical, erect, pedicellate. Peristome double ; the exterior 1 6 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 6rjXr], a papilla, referring to the prominent pa- 

 pillae of the leaf.) 



1. T. llil'tella, (Hedw.) Sulliv. — Leaves inclining to a dark yellowish- 

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

 on the back, the papilla? elongated, curved, simple ; perichsetial leaves fringed. 

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

 common. 



2. T. aspr£19a, (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. Lescuril, 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 papilla? 3-lobed at the apex ; 

 pedicel twice as long ; capsule longer, often sljghtly curved, the moath with a 



