Jennings: Manual of Mosses — 18. Bartramiaceae 151 



rather long-excurrent 1. P. lorigiseta 



B. Perigonia terminal and discoid or rosette-like C 



C. Leaves neither plicate nor with either or both margins revolute D 



C. Leaves plicate and more or less revolute 5. P. calcarea var. occidentalu 



D. Costa weak but more or less spinulose-excurrent; leaf-cells linear; cilia well devel- 

 oped 2. P. marchica 



D. Costa only percurrent to shortly excurrent; leaf-cells linear-oblong to oblong; cilir, 



short and rudimentary ?. P. Muhlenbergit 



1. Philonotis LONGISETA (Richard) E. G. Britton 



{BdTtramia longisetj Richard; Bartramij radicalis Beauvois) 



Stems rather slender, yellowish to green, up to 2 cm high; leaves ascending 

 to spreading, lanceolate to somewhat triangular-lanceolate, about 1-1.5 mm 

 long, margins bluntly serrate and revolute; costa weak but percurrent to dis- 

 tinctly e.\'current; leaf-cells papillose, rectangular to linear above, larger below; 

 autoicous, perigonia often lateral, gemmiform, perigonial bracts lanceolate from 

 an ovate to oblong clasping base; perichaetial bracts slenderly lanceolate acu- 

 minate from an ovate or oblong base, with costa excurrent; seta up to about 2 

 cm long, castaneous; capsule tilted or slightly drooping, about 1.5-2 mm long, 

 mouth somewhat oblique; lid low-conic; teeth reddish, lance-acuminate, papil- 

 lose, strongly trabeculate; segments shorter, the cilia usually adherent; spores 

 about .025 mm, papillose, and said to be oblong or reniform. 



From Pennsylvania and Ohio south to the Gulf States. Was collected 

 by Wolle at the Nockamixon Cliffs, Bucks County, and in Lehigh County, 

 but not yet reported from our region. 



2. Philonotis marchica (Willdenow) Bridel 



{Leskea marchica Willdenow) 



Tufted, bright green, the older parts tom.entose, up to 7 or 8 cm high; 

 leaves ascending to patent, lance-ovate to triangular lanceolate, serrate, some- 

 times revolute; costa slender but percurrent to spinulose-excurrent; cells oblong- 

 linear above, wider below, mostly with sharp papillae at the upper end: dio- 

 icous; perigonia large, terminal, their bracts lance-acuminate and squarrose 

 from a broad sheathing base, serrate; perichaetial bracts lance-ovate, tapering 

 from an oblong base; seta up to 3 or 4 mm long; capsule tending to subglobose, 

 tilted to drooping, with small oblique mouth; lid rounded-convex; teeth reddish, 

 strongly trabeculate, papillose; segments somewhat shorter, yellowish, papillose 

 in lines; cilia various, rarely well developed and separate above; spores oblong- 

 reniform, rough, reddish. 



Europe; in America from eastern Canada to Minnesota, Georgia, and 



Texas. 



Collected along Slippery Rock Creek by Lesquereux. (Porter's Catalogue). 



3. Philonotis Muhlenbergii (Schwaegrichcn) Bridel 



{P. marchica Sullivant) 

 Plate XXVIII 



Rather densely cespitose, light yellowish to bluish-green: branches reddish, 

 whorled from below the archegonal clusters, erect to ascending, reddish-tomen- 



