136 PROCEEDINGS OP THE AMERICAN ACADEMY 



fecti lineali-lanceolati, seu in linea divisurali usque infra medium lacu- 

 nosi seu bifidi et regulariter bicrures, subramuloso-papillosi, siccitate 

 patentes. Sporse majusculae ferrugineae. 



Hab. On the ground at Enterprise, Florida (W. L. Foster). 



The pale green color of the plants, the long slender yellowish and 

 often twisted pedicel, the curved capsule, and the large perfect teeth 

 of the peristome give to this species the appearance of a Dicranum. 

 It cannot be taken for a variety of Weisia viridula, Brid. 



Weisia "Wolfii. Differt a W. longiseta foliis angustioribus pro 

 ratione longioribus, parte superiore fere exacte tubulosis, humiditate 

 arcuato-recurvis ; capsula in pedicello breviore longiore oblongo-cylin- 

 drica, sicca subcyliudrica, hand sulcata nee sub ore coarctata ; peristo- 

 mii dentibus truncatis. 



Flores dioici, ut in W. longiseta ; operculum subulirostrum. 



Hab. On the ground ut Canton, Illinois {J. Wolf). 



A good species, related to IT. mucronulata, Schimp., in the shape of 

 its leaves. The capsule is small, rather ovate than cylindrical, the 

 operculum long-beaked, and the pedicel flexuose or sometimes gen- 

 iculate. 



Ptychomitrium (Xotarisia) pygjoeum. Planta porpusilla, dense 

 foliosa, olivaceo-viridis. Folia humida patentia, sicca subcirrhata. 

 solidiuscula, e basi ovali pallida linealia, mutica obscure viridia, medio- 

 criter concava, lavia ; costa sat longe sub apice evanida ; reticulum 

 partis superioris chlorophyllo obscuratum perangustum, basilare hya- 

 linum areolis hexagono-rectangulis achlorophyllosis. 



Flores monoici ; masculi in eadem planta complures, secus fem- 

 ineum vel versus basin dispositi, gemmiformes, fuscescentes ; anthe- 

 ridiis parvulis eparaphysatis. 



Fructus : calyptra magna usque ad capsula? basin producta, fusca ; 

 capsula in pedicello brevi rufo ovalis, collo tertiam partem sporangii 

 aequante instructa ; operculum in rostrum subulatum subrectum pro- 

 ductum ; annulus latus ; peristomii dentes 16 subaequales, basi per 

 paria confluentes, hie illic tota longitudine connati, lineali-subulati 

 papillosi, articulationibus parum distihetis rufi. 



Hab. Near the Neosho River, Kansas, and at Bolivar, Missouri 

 (E. Ball). 



This species, the smallest of the genus, is distinguished by its minute 

 size, the structure of its leaves, — areolation obscure in the upper por- 

 tion and hyaline-hexagonal at the base, — and the marked neck of 

 the capsule, extending one third its length. 



