320 A MANUAL OF MOSSES 



densely barred, cilia 2, a little shorter than the segments; 

 spores mature in early summer.- -The species (/. pulchcllum) 

 has numerous, erect, curved branchlets with leaves not com- 

 planate but sub-falcate and regularly homomallous, and more 

 often has the capsules somewhat erect. 



On rocks and roots of trees and on rotten wood, in moist 

 woods; Europe, Asia, and from Arctic America to the north- 

 ern United States. Rare in our region. 



Elk : Benezette. McMinn. (Porter's Cata- 



logue). 



6. Isopterygium micans (Swartz) E. G. Britton. 



(Hypnnin albiiluui C.Mueller ; PL micans Swartz; Sematophyllum 



micans Braithwaite). 



Small, thinly matted, loose, glossy, whitish-green to yel- 

 lowish-green : stems prostrate, rooting, irregularly branching; 

 leaves loose, erect-spreading to secund and pointing upwards, 

 very small, about 0.8-1.2 mm. long, ovate-lanceolate, gradual- 

 ly long-acuminate, serrulate above, thin ; costa usually none ; 

 perichsetial leaves abruptly acuminate, the inner apically ser- 

 rate ; median leaf-cells linear, prosenchymatous, flexuous, about 

 15-18:1, at the base a row considerably enlarged and broad, at 

 the angles a few sub-quadrate : seta long and slender ; capsule 

 very small, ovate-oblong, light castaneous, constricted below 

 the mouth when dry and empty, slightly incurved ; peristome- 

 segments not split, about as long as teeth, the cilia 1 or 2, 

 short, nodose ; annulus none ; lid conic, apiculate to short- 

 rostrate ; spores mature in mid-winter. 



On earth and rotten wood in moist \voods ; mainly along 

 the eastern United States from New 7 York southwards. Rare 



m our region. 



Center : Bear Meadows. T. C. Porter. (Porter's 



Catalogue). 



7. Isopterygium turfaceum (Lindberg) Lindberg. 



(Hypnuui tnrfaccnm Lindberg; Stcreodon titrfacens Mitten; 

 Plagiothcciiun turfaceum Lindberg). 



(Plate XLVII) 



Small, light green to yellowish-green, loosely matted: 

 stems prostrate, more or less pinnately branching with short 

 branches, rooting at the perichaetia and at the main forks and 

 usually quite difficult to separate from the substratum with- 

 out breaking in pieces; leaves about 1.5 mm. long, complanate- 

 ly arranged, lance-ovate, long-acuminate from an ovate-ob- 

 long base, sharply serrate above the middle, margins plane, 

 serrulate, or entire towards the base ; costa none or very short 

 and faint ; perichaetial leaves ovate, basally concave, abruptly 

 short-pointed, dentate at apex; median leaf-cells fusiform to 



