Jennings: Manual of Mosses — 15. Mniaceae 143 



tember 9, 1894, and November 13. 1896. D.A.B. Washington Co.: North Branch 

 of Maple Creek, above Charleroi, April 24, 1908. O.E.J, (figured). 

 Now known also from Erie and Westmoreland counties. 



11. Mnium PUNCTATUM [Linnaeus] Hedwig 

 Plate XXVII 



Rather large., dark green, erect, loosely tufted, 1-3 inches high: stems rigid, 

 dark, densely tomentose nearly to the apex; dioicous; leaves remote, forming 

 at the apex a rosette and largest there, spreading, the lower smaller, rounded- 

 ovate, the terminal about 4-5 x 6-9 mm, broadly obovate, all narrowed to a few 

 cells at the base, entire, apex usually apiculate, often somewhat emarginate- 

 apiculate, bordered by a cartilaginous-thickened purplish-brown-pellucid rim of 

 about 2-5 rows of elongate incrassate cells; costa strong, usually terminating or 

 percurrent in the apiculus. or sometimes ceasing just below the apex; median 

 cells rounded- to elongate-hexagonal, about .030-. 040 x .0;0-.085 mm, incras- 

 sate, often in obliquely ascending series from costa to border, the basal rather 

 larger, rectangular, slightly inflated, the apical smaller, irregularly angular: 

 seta 2-3 cm long, erect, f^exuous, purplish-brown, rather lustrous; capsule sub- 

 pendulous, oval-oblong, yellowish to brown when old, finally when dry some- 

 what sulcate; operculum conic, acutely rostrate; peristome-teeth yellowish-brown, 

 pellucid, papillose, trabeculate; segments nearly as high, yellow-pellucid, finely 

 papillose, the basal membrane reaching to one-third the height, cilia usually 

 three, slightly shorter than segments; spores smoothish, round, about .030-040 

 mm; fruiting in spring rather early (April), and sometimes with two or three 

 capsules to a plant; usuallv dioicous. 



On soil and rocks in damp woods, ravines, swamps, etc. Rather common. 

 Europe, .A.sia, and North America down to middle United States. 



Known from the following counties: Allegheny, Armstrong. Butler. Cameron, Clear- 

 field, Clinton, Crawford, Elk (Porter), Fayette, Forest, Huntingdon (Porter), Lawrence, 

 MfKean, Mercer, Somerset, Tioga, Venango, Warren, Washington, and Westmoreland, 

 and probably occurs in all. Specimen figured: Shades, above Blackburn, Westmoreland 

 Co.. March 25, 1910. O.E.J. 



Ua. Mnium punctatum var. elatum Schimper 

 Plate XXVII 



This variety differs typically from true punctatutn in that it grows in muddy 

 shaded places and swamps, is much larger, — in our specimens reaching a height 

 of 7 or 8 cm and with leaves up to 10 or 11 mm long, the leaves are rounded 

 and usually non-apiculate at apex, the border consisting of usually but one 

 layer of cells, and the costa ending below the apex. 



In swamps and muddy shaded places: Europe, Asia, and, in North 

 America, from the Arctic regions south to Virginia, Michigan, and Idaho. In 

 Pennsylvania most of the specimens of punctatum show some of the characters 

 of the variety but we have found no specimen which clearly possesses all the 

 characters attributed to the variety. The following specimens more or less 

 closely approach the variety: 



Known from the following counties: Allegheny. Clarion. Crawford, Fayette, Lawrence. 



