LESKEACEAE 77 



Key 



I — Leaves papillose, costate; median cells usually isodiametric; peristomal 



teeth abruptly incurved from a bulging base when dry. . . Euleskea 2 



Leaves smooth or nearly so, costate or ecostate; peristomial teeth erect 



when dry denticulata. 



2 — Leaves ovate-lanceolate, acute to acuminate, more than twice as long as 



wide 3 



Leaves ovate, subacute to obtuse, less than twice as long as wide 4 



3 — Capsules straight (except var. paludosa); operculum short-conic 



polycarpa 



Capsules curved; operculum long-conic arenicola 



4 — Leaves symmetric, biplicate, margins often revolute gracilescens 



Leaves asymmetric, not plicate, margins plane obscura 



L. arenicola Best. Rosemont and New Lisbon, N. J., Best. 

 Probably frequent. 



L. denticulata Sull. "On dry rocks and roots of trees, 

 always sterile in N. Y. and N. J.," Muse. App. 267; Orange, 

 Bry. Ct.* 



L. gracilescens Hedw. Byram, Stockton, & Rosemont, N. J., 

 Best; Toms River, N. J.!!, on shade trees in the street. 

 Probably not rare about N. Y. City, but is little known. 



L. obscura Ehrh. "On stones and roots of trees within the 

 reach of floods; common," Muse. App. 270; Bronx Park, E. G. 

 B. & R. S. W., Bx!; Willow Brook, S. Id.!!; Yonkers, Howe, 

 and Closter, N. J., Austin, Bx! 



L. polycarpa Ehrh. Bronx Park and S. Id., E. G. B., Bx!; 

 Closter, N. J., Austin, Bx! 



LINDBERGIA Kindb. 



Differs from Leskea in having peristome teeth papillose, 

 inner peristome a short basal membrane without teeth or cilia. 



L. Austinii (Sull.) Broth. (Leskea Austinii Sull.). "On 

 stone fences, Sussex Co., N. J.," Muse. App. 268. 



PTERIGYNANDRUM Hedw. 



Somewhat resembles Leskea in general appearance and in- 

 habits similar places, roots and bases of trees, damp stones, etc. 



* Brotherus in "die Naturlichen Pflanzenfamilien" puts this in the Entodon- 

 taceae (Entodonteae) as Schzvetschkeopsts denticulata (Sull.) Broth. 



