OF WESTERN PENNSYLVANIA 201 



Cambria : Cresson, May 18, 1904. O. E. J. ; upland 



plateau near St. Lawrence, July 24, 1908. 

 O. E. J. 



Crawford : Near Linesville, May 12, 1908, and Harts- 



town, June 26-28, 1908. O. E. J. (Fig- 

 ured). (Near Linesville this variety 

 forms quite extensive heaths in the low- 

 lying peaty pastures around the Pymatun- 

 ing Swamp, especially on the low mounds 

 of peaty soil formed by the uprooting of 

 trees and their subsequent decay. 



Family XXIII. HBDWIGIACEAE. 



Autoicous or dioicous, rarely synoicous ; paraphyses long, 

 yellow, filiform : more or less robust, stifif, cespitose ; stem with- 

 out central strand, irregularly to almost pinnately branched, 

 rarely with long, pendent, 2-3-pinnate branches, densely- 

 leaved, radiculose below, sometimes stoloniferous ; leaves about 

 8-seriate, spreading, drying imbricate, broad, thin, ecostate, 

 concave, sometimes plicate, papillose; lamina one-layered, 

 golden-brown at base, cells incrassate, punctate, non-margined, 

 with several rows of small quadrate cells in the alar portion, 

 or margined with the alar_ portion concave, sharply differen- 

 tiated by large, colored, 4-6-sided cells ; leaves on stolons 

 recurved-squarrose, from a wider base suddenly long pilifer- 

 ous-acuminate ; perichsetial leaves erect, longer than the stem- 

 leaves, with ciliate margins at apex ; seta various ; vaginula 

 ciliate ; capsule short, erect, shortly and thickly collumate ; 

 annulus none ; spores large ; operculum low, convex to ros- 

 trate; calyptra minute and mitrate to large and cucullate. 



A small but widely distributed family of six genera, only 

 one genus in our region. 



1. HBDWIGIA Ehrhart, Hedwig. 



Autoicous : laxly cespitose, glaucous-green ; non-stoloni- 

 ferous, erect to ascending, irregularly branched ; leaves con- 

 cave, ovate, tipped with a hyaline, serrate to ciliate acumination, 

 margins revolute, entire, non-bordered ; leaf-cells two- to sev- 

 eral-papillose, papillse on both sides, the upper cells oblong, 

 the lower elongate, the median basal yellow, linear, becoming- 

 quadrate and brownish towards the angles; perichzetial leaves 

 larger, the upper margins furnished with long, sinuose, articu- 

 late, sometimes toothed cilia r seta about 5-8 mm. long, 

 yellow, thicker upwards ; capsule immersed, obovate to glo- 

 bose, smooth, pale brown, the mouth red and wide; spores 

 .028-.032 mm., yellow with vermiform lines; operculum plano- 

 convex, red, sometimes unbonate; calyptra minute, conic- 

 mitrate, fugaceous, covering only the apex of the operculum. 



