660 (60) Musci. (mosses.) 



6V. CtASMATODOW, Hook. & Wils. (Tab. V.) 



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

 cellate. Peristome single : teeth 16, short, 1 - 2-clivided into in-egular segments, 

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

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

 gled, irregulai-ly branched stems, and broadly ovate-acuminate semi-costate 

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

 68o)v, 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, Schweinits (not Michaux). Leskea par- 

 vula, Hampe. L. Sullivantii, Bryol. Europ.? Anisodon tenuii-ostris, Bryol. 

 Europ. Clasmatodon pusillus, Hook.Sj- 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. V.) 



Tkibe XXVni. THELIE^. 



68. THEL.IA, Sulliv. 



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

 cylindi-ical, erect, pedicellate. Peristome double; the exterior 16 long, liuear- 

 subulate, white, granulated, distantly ai-ticulated teeth ; the interior a cai'iuate 

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

 cUia. — 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- 

 papiUate cellules. (Name from Brjkr), a papilla, refening to the prominent pa- 

 pillrE of the leaf.) 



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

 green, obsoletely semi-costate, cUiate-dentate on the margins, strongly papillose 

 on the back, the papillfe elongated, curved, simple ; perich^tial leaves fringed. 

 (Pterigynandmm hirtellum, Hedw. ) — Eoots and trunks of trees in woods ; 

 common. 



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

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

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

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

 and Middle States, and westward. 



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

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

 leaves glaucous-gi'een, with a bluish tinge, shorter, broader, not so acuminate, 

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

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



