OF WESTERN PENNSYLVANIA 243 



obtuse, acute, or rostrate; calyptra cucullate, smooth; spores 

 small. 



About 30 species confined to the Northern Hemisphere; 

 10 in North America; 5 species in our region. 



Key to the Species. 



a. Slender and flagelliform branches present: annulus none, teeth 



striate. 4. A. attenuatus. 



a. Slender and flagelliform branches none: annulus present. 



b. 

 b. Teeth striate: leaves with a hyaline, piliferous-subulate acumi- 



nation. _ 5. A. rostratus. 



b. Teeth papillose, non-striate: leaf-acumination not piliferous- 

 acuminate. c. 



c. Leaves with rounded basal auricles, apex apiculate. 



1. A. apiciilatus. 

 c. Leaves not auricled. d. 



d. Leaves not secund, the upper half of leaf oblong-lingulate: 



teeth nodose. 2. A. minor. 



d. Leaves more or less secund, lance-lingulate: teeth not nodose. 



3. A. viticulosus. 



1. Anomodon apiculatus Bryologia Europsea. 



{Leskea apiculata W. P. Scfiimper; Hypnnm rugelii C. Mueller). 



(Plate XXXIV) 



Cespitose in tangled mats, glaucous-green, reddish or 

 brownish when old: stems creeping, divided, the secondary 

 stems and branches straight or ascending; leaves L5-1.8 mm. 

 long, more or less obscurely two-ranked, abruptly oblong- 

 lingulate from an ovate or oblong-ovate and broader base, the 

 base non-decurrent but with very large and broadly rounded 

 fimbriate-papillose auricles, the apex often apiculate, the upper 

 margin broadly incurved, the leaves when dry crispate ; costa 

 pellucid, ending considerably below the apex ; leaf-cells opaque, 

 chlorophyllose, minute, rounded, papillose on both faces, the 

 median basal elongate, smooth, the alar somewhat larger, 

 rounded-quadrate ; inner perichsetial leaves long-sheathing : seta 

 erect, about 5-7 mm. long, dextrorse above, sinistrorse below; 

 capsule erect or somewhat inclined, symmetric, ovate-cylindric, 

 about 2-2.3x0.5 mm., thick-walled, castaneous, longitudinally 

 many-plicate when dry ; annulus none ; lid conic-acuminate, 

 small ; peristome double, the teeth lance-linear, nodose-articu- 

 late, faintly papillose, the dorsal lamellae and divisural usual- 

 ly very faint or invisible, the segments rudimentary, or very 

 short, from a low basal membrane ; spores mature in autumn, 

 medium-walled, brownish, papillose, about .009-012 mm. 



On shaded rocks and bases of trees or on decayed logs, in 

 woods, mainly in mountainous districts; Europe, Asia, and 

 from New England to Ontario and Georgia. Rare in our 

 region. 



