46 TORTULACEAE 



costa reaching apex or beyond; areolation rather lax for the 

 family. Capsule erect and exserted on a straight seta, ovoid 

 to cylindric; peristome lacking in our species. 



P. truncatula (L.) Lindb. (P. truncata Fuern.) Hemp- 

 stead, L. Id., New Dorp, S. Id., Bronx Park, E. G. B. All at 

 Bx. ; Hackensack, N. J., Austin, Bx! On soil in fields. Late 

 autumn to spring. 



HYOPHILA Brid. 



Leaves subspatulate, more or less denticulate, slightly papil- 

 lose, with costa ending below apex. Capsule narrowly cylin- 

 drical-oblong; peristome lacking. 



H. riparia (Aust.) Fleisch. (Pottia riparia Aust.) "Moist 

 rocks along streams, Palisades and northern N. J. & southern 

 N. Y.," Muse. App. 112; Hohokus, Pascack, and Little Falls, 

 N. J., Austin. Rarely fruiting. 



Subfamily Tortuleae 



Leaves broad, oblong to spatulate or lingulate. Peristome of 

 thirty-two long filiform spirally twisted teeth or of sixteen 

 shorter scarcely twisted teeth. Costa nearly always excurrent. 



Encalypta species are likely to be sought here, especially if 

 sterile, but the papillae in Encalypta are very large and verru- 

 cose and the costa not excurrent or very shortly so. In E. 

 streptocarpa, our most common species, the leaf margins are 

 incurved above and the apex almost cucullate. 



DESMATODON Brid. 



This genus as a whole is scarcely distinct from Tortula, except 

 that the basal membrane is very narrow or lacking, and the 

 peristome is short and scarcely twisted, sometimes so short as 

 to be scarcely visible with a hand-lens. 



D. arenaceus S. & L. "On the ground near Closter and 

 Southern N. J.," Muse. App. 122. According to R. S. Williams 

 some at least of this number is Barbula convoluta. 



D. Porteri James. Easton, Pa., Muse. App. 123. This is 

 likely to be found nearer. 



