164 A MANUAL OF MOSSES 



linear, much incrassate, more or less colored cells, the laminal 

 cells all incrassate and collenchymatous : synoicous : capsules 

 clustered, occasionally single, on erect stout setae, pendent, 

 oblong ; operculum con^'ex, rostrate-apiculate : mature in May. 

 Mostly on wet rocks and shaded damp earth and logs; 

 cooler Europe and Asia, and, in North America, from Green- 

 land to Alaska and south to New Jersey, Pennsylvania, Min- 

 nesota, Idaho to California. 



In Pennsylvania found only in Monroe County and: 

 McKean : On leaf-mold, etc., at headwaters oi 



Marilla Brook in wet, springy places, Sep- 

 tember 24, 1894 (Figured), West Branch 

 Swamp, May 26, 1895, Bradford, Novem- 

 ber 2, 1898. All D. A. B. 



8. Mnium affine Blandow, Schwaegrichen. 

 (Astrophylluin cuspidatuin Lindberg). 

 As Grout points out in his "Mosses with Hand-lens and 

 Microscope," the true Mnium aitine Blandow is rare in eastern 

 United States, and it apparently has not yet been found in Penn- 

 sylvania. It has the capsules usually clustered, 2-4 together, 

 and the teeth of the leaves shorter than in the variety ciliare. Its 

 general range is Europe, Asia, and North America south to New 

 Jersey, West Virginia, and Washington. 



8a. Mnium afBne var. ciliare (Greville) C. Mueller. 

 {Astro phyllum ciliare Lindberg; Bryum ciliare Greville). 



(Plate XXII) 

 Moderately large, loosely cespitose, pale to dark green 

 with age : stems erect, usually about 3 cm. high, reddish- 

 brown, rather stout, radiculose below, with long, slender sterile 

 shoots which are prostrate or arched ; stem-leaves ovate, vary- 

 ing to oblong-elliptic or at the apex rosulate and obovate to 

 narrow spatulate, somewhat acute, apiculate, up 6-10 mm. 

 long, decurrent, margined, serrate down to the narrowed base 

 v/ith long slender teeth of 2-A cells ; costa excurrent-apiculate, 

 strong; leaf-cells large, .020-. 040 (-.070) mm. in diameter, 

 angled, somewhat incrassate, hexagonal to irregularly some- 

 what elongate rectangular, especially towards the base, hardly 

 collenchymatous, marginal cells prosenchymatous-linear and 

 cartilaginous pellucid, often yellowish to reddish : seta single, 

 erect flexuous, strong, reddish, about 2.5 cm. long; capsule 

 pendent, elliptic-oblong, about 4 mm. long, narrowed to a 

 short darker colored neck, yellowish-brown ; lid conic-apicu- 

 late ; peristome-teeth pale pellucid, strongly trabeculate, the 

 divisural rather faint, finely papillose above ; inner peristome 

 brownish pellucid, the basal membrane reaching about half- 



