MUSCI. (MOSSES.) 671 



horizontal surfaces, it assumes an upright and larger growth, an 1 becomes IL 

 Marylandicum and H. Carolinianum, Mull. Synop. (Eu.) 



26. H. microcarpum, C. Mull. Monoecious ; growth close and en- 

 tangled ; branches short, recurved ; leaves shining, bright green or yellowish, 

 narrowly oblong-lanceolate, concave, obsoletely short-cos tate; capsule more or 

 less symmetrical, erect or inclined ; ciliola3 of the peristome often absBnt. 

 (Leskea adnata, Michx.) Trunks of trees, in the Southern States. 



27. H. cyliiidricarpum, Mull. Synop. (1851). Dioecious; stems 

 prostrate, subpinnately branched ; leaves narrowly lanceolate, with a long-atten- 

 uated serrate point, bifariously imbricated, falcate-seeund, ecostate ; capsule 

 elongated-cylindrical, regular and erect, or slightly unequal and curved ; ciliola 

 of the inner peristome rudimentary. (Muse. Alleghan. No. 60. Leskea tenuiros- 

 tris, W. P. Sch.; Ed. 1, 1848.) Grows in close, yellowish, shining mats on 

 'logs, in woods, Alleghany Mountains and Central Ohio. 



28. H. reciirvans, Schwsegr. Monoecious ; forms palish-green shining 

 mats, fruiting abundantly ; leaves bifariously imbricating, ovate-lanceolate from 

 a constricted base, secund-falcate, strongly serrate near the point, with two faint 

 costae at the base ; capsule short-oval, horizontal-incurved. Decayed logs, Alle- 

 ghany Mountains. Very common, and variable in size. 



29. H. all>lilnill, C. Mull. Monoecious; stems and branches flat ; leaves 

 lax, spreading, bifarious, oblong-lanceolate, slightly serrulate and subsecund, 

 with two very short costae at the base ; capsule oblong, cernuous. (H. subsim- 

 plex, Hook.Sf Wils.; Muse. Alleghan.) Moist places, on the ground and on 

 decayed wood. A small Moss, with delicate pellucid foliage, varying from 

 dark to pale-whitish green : difficult to distinguish from small forms of H. re- 

 curvans : the alar cellules less distinct and inflated. 



4 10. LIMNOBIUM, Brvol. Europ. A/am stems prostrate, irr&fularly branched, 

 ascending : leaves varying from orbicular to elongated-lanceolate, shortly unicostate 

 or obsoletely bicostate ; celhdes olilong or linear : capsule turgid-ovate or oblong, cer- 

 nuous : operculum hemispherical, apiculate, or short-conic. 



30. H. eilgyrillill, Bryol. Europ. (Muse. Bor.-Amer. No. 303.) Mo- 

 iicecious ; main-stems leafless below, rigid ; branches irregularly divided ; leaves 

 broadly ovate-lanceolate and oblong-lanceolate, shortly acuminate, concave, more 

 or less complicate and contorted, secund, snbfalcate, shortly bicostate, the ex- 

 cavated basal angles composed of large pellucid fulvous cellules ; capsule oblong, 

 cernuous-iucurvcd ; annulus very broad. (H. palustre, James, in Ptoceed. Acad. 

 Nat. Set. 1855. Limnobium rufescens, Schimp. ined.) White Mountains, New 

 Hampshire, Oaken, James. Smoky Mountains, Tennessee, Rugcl. H. palustre, 

 Li., Bryol. Europ., (common in British America, Drummond,) not vet found within 

 our limits, has no annulus ; and the basal angles of the leaves are different. (Eu.) 



31. H. Hiollc, Dtckson. Monoecious; somewhat larger than the preced- 

 ing; branches thicker and more obtuse, not so divided; leaves flaccid, widely 

 spreading, subsecund, roundish, apiculate, entire or erose-(k-ntieulate at the apex ; 

 capsule short, turgid. Mountain rivulets, North Carolina, Curtis, Levitt, eux. 

 (Eu.) 



