MUSCI. (MOSSES.) 665 



6. C. brevisetnm, Bryol. Europ. Ramification subfasciculate ; branches 

 nearly terete, acuminate ; leaves crowded, ovate and oblong-ovate, the point ex- 

 tended and subserrulats, the margins slightly reflexed ; annulus large ; inner 

 peristome abortive, or a membrane lining the teeth. Dry places, on trees, &o., 

 Western and Southern States ; not common. Fruits sparingly. 



TRIBE XXXU. NECKERE^. 



76. WECKERA, Hedw. ; Bryol. Europ. (Tab.19.) 



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

 pedicellate, immersed or exserted. Peristome double; the exterior 16 long lin- 

 ear-acuminate teeth; the interior 16 subulate cilia, more or less developed, the 

 basilar membrane very narrow. Inflorescence monoecious or dioecious. Rather 

 large species, conspicuous for their flat broad stems, and shining, coraplanate, 

 ovate-lanceolate, scarcely costate, and mostly transversely undulate leaves, of a 

 thin, smooth texture, and a minute elongated-rhomboidal areolation. (Named 

 for 2V. /. Necker.) 



1. N. pcmiuta, Hedw. Monoecious ; branchlcts obtuse ; leaves acumi- 

 nate ; capsule immersed in the long perichaetial leaves ; cilia of the inner peri- 

 stome obsolete or rudimentary. Trunks of trees ; common in mountainous 

 districts. (Tab. 19.) (Eu.) 



2. N. complauiita, Bryol. Europ. Dioecious ; branches often attenu- 

 ated, flagelliform ; leaves ovate-oblong, obtuse, apiculate, not undulate ; capsule 

 long-pedicelled, exserted ; peristome with cilia half as long as the teeth. (Les- 

 kea complanata, Hedw.) On rocks, New England, Alleghany Mountains, and 

 Tennessee. (Eu.) 



77. OMAL.IA, (Brid.) Bryol. Europ. (Tab.19.) 



Calyptra cuculliform. Operculum conic, rostellate. Capsule oblong, erect, 

 or slightly cernuous, pedicellate. Peristome as in Hypnum Inflorescence 

 monoecious. Ramification irregular; stems and branches flat, interruptedly 

 leafy ; leaves complanate, ovate-oblong, semi-costate, obtuse, apiculate, shining, 

 with a minute rhombic areolation. (Name from 6/zaXos, flat, referring to the 

 stems and branches.) (Tab. 19.) 



1. O. tridiomaiioides, (Brid.) Bryol. Europ. Main branches ascend- 

 ing, arcuate-incurved, irregularly ramulose ; leaves often somewhat falciform, 

 lax, pale-green, serrulate above ; capsule oval-oblong ; ciliolae of the inner peri- 

 stome rudimentary or absent. On rocks, about Lake Superior, but rare, Drum- 

 inond. (Eu.) 



2. O. Jaiiiesifuia, W. P. Sch. mss. Found by Mr. Thomas P. James 

 on the "White Mountains, New Hampshire, and on the Catskill Mountains, New 

 York. (Hypnum trichomanoides, James, Enum.) We have seen no descrip- 

 tion of this species, and our specimens are too imperfect (being without fruit) to 

 exhibit the distinctive characters. 



3. O. ! Wrightii, Sulliv. (Muse. Bor.-Amer. No. 269.) Stems pros- 



56* 



