Jennings: Manual of Mosses — 31. Hypnaceae 237 



smooth; annulus broad, 3-seriate; lid high-convex, conic-acuminate; peristome 

 hypnoid, teeth orange-ycIIow, paler above, segments somewhat carinately split, 

 cilia 2, slender and about as long as segments; spores mature in late spring or 

 early summer. 



On earth, decaying wood, stones, etc., bordering streams or in wet situa- 

 tions in the shade, mainly in hilly or mountainous regions almost the world 

 over; in North America from Arctic regions south to the Gulf States. Ex- 

 tremely variable with many named varieties. 



Rare in our region. Cambria Co.: T. P. James. (Porter's Catalogue). Hunting- 

 don Co.: T. C. Porter. (Porter's Catalogue). 



2. Drepanocladus vernicosus (Lindberg) Warnstorf 



{Hypnum vernicosum Lindberg) 



Deeply tufted, yellowish-green, darker or brownish below; stems slender, 

 more or less regularly pinnate, hooked at the ends; central strand none but 

 outer cuticular cells small and somewhat incrassate; stem-leaves plicate, neither 

 auricled nor decurrent lanceolate to ovate-lanceolate, strongly circinate or fal- 

 cate-secund, gradually long acuminate and entire; costa usually reaching beyond 

 the middle of leaf; median leaf-cells linear-flexuous, about 10-12:1; about 2 

 or 3 rows of the basal cells incrassate, reddish or brownish; alar not differen- 

 tiated: inner perichaetial leaves erect, acuminate, costa long: seta 4-5 cm long, 

 reddish; capsule castaneous, cylindric-ovoid, cemuous, curved, narrowed under 

 mouth when dry; lid conic-apiculate; annulus 3-seriate; spores in May or June. 

 Rarely fruiting. 



In usually non-calcareous regions in wet places and swamps. Eurasia, and 

 from Canada south to New Jersey, Pennsylvania, and Ohio. 



3. Drepanocladus intermedius (Lindberg) Warnstorf 



{Hypnum intermedium Lindberg) 



Yellowish-green to brownish tufts; stems slender, showing central strand 

 and inflated hyaline cuticular cells, ascending to erect, 8-15 cm long, irregular- 

 ly pinnate; leaves non-plicate, non-decurrent, from an ovate to oblong base 

 long-acuminate, about 2 mm long, entire; costa thin, disappearing above the 

 middle; leaf cells very narrow, 2-4 in the angles thin-walled and slightly 

 enlarged, forming a faint group; inner perichaetial leaves erect, long and slen- 

 derly acuminate, delicately costate; seta 4-5 cm long, reddish; spores ripe in 

 May or June. 



In bogs, marshy places, or on wet rocks, often forming masses of \'egeta- 

 tion. Possibly to be expected in the northern part of our region. 



4. Drepanocladus aduncus (Hedwig) Warnstorf 



(Hypnum aduncum Hedwig. not Linnaeus) 

 Plate LXVII 



An extremely variable moss of which many varieties and forms have been 

 named. Yellowish- green mats (or tufts), brownish below; stems 2-3 cm long 



