OF ARTS AND SCIENCES. 135 



peranguste lanceolato-subulata ; costa in foliis mediis sat valida, in 

 summis ad basin concavani pertenui; reti densiore; foliis omnibus 

 solidioribus. 



Flores monoid, 6 gemrniformes. Capsula brevius pedicellata brevior. 



B. flexuosa, Sullivant, Icones Muscomm, p. 22, tab. 13. 



Hab. On clayey soil, common. 



Bruchia nigricans is separated by Austin on account of a difference 

 in the color, larger spores, and longer pedicel. The specimens of the 

 Musci Exsiccati were collected on the top of Eaccoon Mountain, in a 

 narrow swampy dej^ression, which was filled with typical B. Sullivanti, 

 as distributed in the Musci Exsiccati under the name of B. flexuosa. 

 In the centre of the moister portion of this area, the moss was covered 

 with confervoidal filaments, which blackened the plants and so decom- 

 posed them that none of all the specimens obtained are entire. We 

 consider therefore this form, upon which B. nigricans is based, as only 

 a casual variety. 



Bruchia brevicollis. Differt a Bruchia Sullivanti planta mi- 

 nore graciliore ; foliis pro ratione longioribus, supra basin ad apicem 

 angustioribus, longe subulatis, subula tota e costa dilatata constituta ; 

 calyptra majore infra sporangium producta ; collo multo breviore 

 angustiore ; pedicello recto ; sporis majoribus. 



Hab. With B. Sullivanti in South Carolina {RaveneV). 



This species and Bruchia Sullivanti, Austin, are generally found 

 together, and are separated from B. flexuosa, Schwaegr., especially by 

 the monoecious inflorescence, the shorter pedicel of the capsule, and 

 the minute spores. The author of B. flexuosa had not mentioned the 

 inflorescence. The monoecious character of B. Sullivanti was first 

 recognized by Sullivant, in his specification, and afterwards confirmed 

 by James, while B. flexuosa is bisexual. 



Weisia longiseta. Planta? magnitudine et habitu illis Weisice 

 viridulce similes. 



Folia e basi concava oblonga pallida longe lineali-lanceolata, valde 

 concava et margine inflexo subtubulosa, acute apiculata, viridia ; costa 

 valida ad apicem producta ; reti superiore perangusto chlorophylloso, 

 basilari laxo omniuo hyalino. 



Flores dioici ; masculi in eadem planta complures hie illic aggregati 

 gemrniformes, polyphylli ; antheridia sat numerosa, paraphysata. 



Capsula in pedicello longo subunciali pertenui subflexuoso lutescente 

 subcernua, ovata, minuta, ferruginea, sicca deoperculata sub ore leniter 

 constricta, longitudinaliter 8-sulcata ; peristomii dentes majusculi, per- 



