30 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



acuminata, mucronata, elimbata, marginibus integris, planis ; costa 

 flexuosa, basi 40 /x, breviter excurrente, cellulis longe hexagonis, 

 36-60 |U.X 10 /*, basilaribus quadratis ; folia innovationis inferiora 

 minuta, caetera sensim majora, valde concava, apice congesta. Folia 

 perichaetialia majora, deltoidea; pedicellus pertenuis, flexuosus, 12-15 

 mm. longus ; capsula suberecta vel horizontalis, microstoma, oblongo- 

 cylindrica, collo longo attenuata ; annulus latus ; operculum conico- 

 convexum, mamillatum ; peristomium externum normale, 0.32 mm. 

 altum, internum? (capsulae immaturae) ; sporae laeves, 18 fi crassae. 

 In the size and form of its capsule this species recalls B. ruhricarpuin 

 (Besch.). It differs in its leaves, which are of another form, short- 

 mucronate, with the hair-point not spreading when dry, in its areola- 

 tion, the median cells of which are a little shorter and the marginal 

 cells not differentiated, and in its paler capsule. 



BRYUM BOTTERII C. M. Linnaea 38: 622. 1874 



Valle de Mexico {Bro. Amahle) : Desierto (1619, 1633, 1637) ! 

 Rio Frio (1709); Salazar (1714); Llano Grande, 3,700 meters 

 (1736). 



BARTRA^IIACEAE (continued) 



BARTRAMIA ITHYPHYLLA (Hall.) Brid. 



Valle de Mexico: Rio Frio {Bro. Amablc 1405, 1407 p. p.). 

 This species is new to Mexico. 



BARTRAMIA THRAUSTA Schimp.; C. M., Nuov. Giorn. Bot. Ital. 4: 41. 1897 



Valle de Mexico: On rocks [Bro. Amablc 1502 p. p., 1503 p. p.). 



An interesting discovery. This species belongs to the South Amer- 

 ican flora and was known previously only from Bolivia and Argen- 

 tina. Unfortunately I found only two specimens, these among tufts 

 of Anacolia intertcxta. 



BARTRAMIDULA MEXICANA Schimp. in Besch. Prodr. Bryol. Mex. 58. 1871 

 Valle de Mexico: Desierto (Bro. Amablc 1624). 



PTYCHOMITRIACEAE 



PTYCHOMITRIUM LEPIDOMITRIUIVT Schimp. in Besch. Prodr. Bryol. 



Mex. 41. 1871 



Valle de Mexico (Bro. Amablc) : Contreras (1443, 1469) ; Salazar 



(1719)- 



