90 HYPNACEAE 



Musci Pleurocarpi, I collected three weeks later and most of 

 the opercula had fallen. 



Key 



l — Apical cells of branch leaves oblong-rhomboidal to circular 2 



Apical cells of branch leaves not materially different from the median 



cells serrulatum 



2 — Aquatic or subaquatic rusciforme 



Terrestrial 3 



3 — Seta rough hians 



Seta smooth strigosum 



E. hians (Hedvv.) J. & S. Common on sandy soil especially 

 in woods, but mostly sterile. Late autumn. 



E. rusciforme (Neck.) Milde. "On rocks in rapid streams, 

 common," Muse. App. 347. Closter, N. J., Bx!. near Northvale, 

 N. J.!!; Princes Bay, S. Id., E. G. B., Bx!; Yonkers, Howe, 

 Bx!; Palisades, N. Y., R. S. W. & E. G. B., Bx! August. 



E. serrulatum (Hedw.) Kindb. Common on shaded soil, 

 especially at base of trees. Sept. -Oct. 



E. strigosum (Hoffm.) B. & S. var. robustum Roell. "On 

 banks in woods, common," Muse. App. 332. Not common 

 according to my experience. Ridgewood, New Utrecht, North- 

 port, Orient, on L. Id.; S. Id., Palisades, East Chester, Bronx- 

 ville, E. G. B., Bx!; Yonkers, Howe. 



Var. praecox (Hedw.) Husnot. New Utrecht and New Lots, 

 Brainerd (H. S.)!; Prospect Park!! and Cold Spring!!; all from 

 L. Id. "On shaded banks, common," Muse. App. 333 (as E. 

 diver sifoli um) ; Egbertville and New Dorp, S. Id., E. G. B., Bx!; 

 Hampton Court, Richmond, S. Id.!! 



Var. scabrisetum Grout. Type from Palisades, N. J., 

 also from By ram, N. J., Best. 



HOMALOTHECIELLA Cardot. 



Homalotheciella differs from Euhomalothecium Card, in its 

 small size and concave nonplicate leaves. From Brachythecium 

 it differs in the hairy calyptra and imperfect peristome. The 

 plants have almost the appearance of a Pylaisia. The resem- 

 blance is all the more striking because the segments of the 



