122 American Midland Naturalist Monograph No. 6 



1. Leptobryum pyriforme [Linnaeus] Schimper 



{Webera piriformis Hedwig) 



Plate XXI 



Densely cespitose in light yellowish-green, soft, lustrous tufts: stems .5-1.5 

 cm high, slender, erect, reddish, brown-radiculose at base; leaves mostly erect- 

 spreading, flexuous, the upper forming a comal tuft, linear-setaceous, up to 

 4-5 mm, long, the basal portion lanceolate, the upper portion flexuous, with 

 plane margin, denticulate above; costa strong but rather wide and indistinct, 

 occupying most of the upper portion of the leaf and somewhat excurrent; 

 leaf-cells narrow and linear-prosenchymatous, or below elongate and paren- 

 chymatous, at base rectangular and larger, all thin-walled; perichaetial bracts 

 linear from a wider base: seta slender, flexuous, orange to brown, about 1-1.5 

 cm long; capsule inclined to pendulous, pyriform with a long narrow nrck, 

 altogether about 2.5 mm long, the neck much wrinkled when old, and at least 

 as long as the globose-oval part of the capsule, which is a lustrous orange- to 

 dark chestnut-brown, the mouth rather wide; annulus wide; peristome-teeth 

 yellowish, linear-lanceolate, the upper third suddenly narrower and sub-hyaline 

 and papillose, trabeculate, lamellae and divisural evident; segments about as 

 long, carinately split and sometimes gaping; cilia 3, strongly appcndicuate, 

 about as long as segments, basal membrane one-third to almost one-half the 

 height of the teeth; operculum convex-apiculate : spores smoothish, about .012- 

 .015 mm: usually synoicous: mature in June or July. 



On moist shaded soil, old walls, shaded cliffs and rocks n'-ar trickling 

 water, etc. Cosmopolitan. 



Now known from Allegheny, Butler. Erie, MrKean, Tioga, Washington, and West- 

 moreland counties. Specimen figured: On stone wall, Perrysville Ave., North Side, Pitts- 

 burgh. May 26, 1909. 



2. Pohlia Hedwig 

 (Webera Hedwig) 



Mostly paroicous or dioicous: paraphyses mostly present and filiform: 

 robust to weak, gregarious, or cespitose: stem mostly red; leaves more or less 

 tufted on the fertile shoots, linear-lanceolate to lanceolate, non-bordered, 

 towards apex more or less toothed; costa mostly incomplete; cells narrowly 

 rhomboid-hexagonal to linear, the basal slightly more lax: seta long, slcnd'r, 

 tortuous and twisted, at apex hooked or curved; capsule cemuous or pendu- 

 lous, rarely erect, with short collum, obovate to oblanccolate or long-clavate; 

 nnnulus mostly biseriate; peristome inserted near the mouth; teeth yellowish, 

 papillose, with border narrow or none; segments mostly about as long, rarely 

 rudimentary, often with a low basal membrane, often narrow, usually split bu: 

 not fenestrate, cilia non-apf>endiculate, often rudimentary or lackina; spores 

 mostly small; operculum convex-conic, umbonate or apiculate. 



A world-wide genus of about 120 species, inhibiting soil, rocks, and decay- 

 ing wood. About 40 species in North America; at least 5 species in our 

 range. 



