Jennings: Manual of Mosses — 23. Hedwigiaceae 171 



Cambria Co.: Cresson, May 18, 1904. O.E.J. ; upland plateau near St. Lawrence, 

 July 24, 1908. O.E.J. Crawford Co.: Near Linesville, May 12, 1908; and Harts- 

 town, June 28, 1908. O.E.J, (figured). (Near Linesville this variety forms quite exten- 

 sive heaths in the low-lying peaty pastures around the Pymatuning Swamp, especially on 

 the low mounds of peaty soil formed by the uprooting and subsequent decay of trees). 



6b. POLYTRICHUM COMMUNE var. PERIGONIALE (Michaux) 



Bryologia Europaea 



Lamellae 6-9 (instead of 4 9 cells high), inner perichaetial bracts much 

 longer than foliage leaves; operculum with straight beak. Arctic America 

 south to North Carolina. Not yet known from our region. 



Family 23. Hedwigiaceae 



Autoicous; paraphyses long, yellow, filiform: more or less robust, stiff, 

 cespitose; stem without 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 im- 

 bricate, 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 differentiated by large, colored, 4-6-sided cells; 

 leaves on stolons recurved-squarrose, from a wider base suddenly long pilifer- 

 ous-acuminate; perichaetial 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 rostrate; calyptra minute and mitrate to large and cucullate. 



A small but widely distributed family of six genera, only one genus in 

 our region. 



1. Hedwigia Ehrhart, Hedwig 



Autoicous: laxly cespitose, glaucous-green: rarely stoloniferous, erect to 

 ascending, irregularly branched; leaves concave, ovate, tipped with a hyaline, 

 serrate to ciliate acumination, margins revolute, entire, non-bordered; leaf-cells 

 two- to several-papillose, papillae on both sides, the upper cells oblong, the 

 lower elongate, the median basal yellow, linear, becoming quadrate and brown- 

 ish towards the angles; perichaetial leaves larger, the upper margins furnished 

 with long, sinuose, articulate, sometimes toothed cilia: seta about 5-8 mm long, 

 yellow, thicker upwards; capsule immersed, obovate to globose, 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. 



A cosmopolitan genus of one very variable species, occurring on non- 

 calcareus rocks. 



1. Hedwigia ciliata [Ehrhart] Bryologia Europaea 



(H. albicans Lindberg; Fontinalis albicans Weber; Anictangium ctliatum Hedwig) 



Plate XXXIV 

 In patches of varying size up to quite large, blackish or brownish below, 



