Jennings: Manual of Mosses — 31. Hypnaceae 225 



2. Amblystegiella confervoides (Bridel) Loeske 



{Hypnum confervoides Bridel; Hypnum conferva Schwaegrichen; 

 A conferva (Schwaegrichen) Jennings) 



Dark green, minute; stems irregularly branching, about 0.5-1.0 cm long; 

 leaves very small, about 0.1-0.3 mm. long, rather distant, more or less appressed 

 both wet and dry, entire or almost so, ovate, acuminate, ecostate; leaf-ccHs 

 irregularly quadrate-rhomboid to oblong-hexagonal, ranging from 1-3:1, some 

 of them wider transversely, the apical shorter than the median, usually not 

 more than twice as long as wide, the alar numerous and quadrate to trans- 

 versely elongate, extending up to the edge of the leaf: capsule cernuous, 

 reddish-brown, more or less curved, oblong, minute; peristome perfect with 

 double cilia or sometimes 3; spores mature in summer to autumn: autoicous. 



Mainly on shaded ledges of limestone; Europe, Asia, and, in North Ameri- 

 ca from New Brunswick to southeastern Pennsylvania and westward to the 

 Rocky Mountains. 



Rare in our region. Huntingdon Co.: On limestone rocks, one mile south of 

 Pennsylvania Furnace, July 13, 1909. O.E.J. 



3. Amblystegiella subtilis (Hedwig) Loeske 



(Leskea subtilis Hedwig; Amblystegium subtile Bryologia Europaea) 



Small, slender mosses in dark green, thin mats; stems about 2-3 cm long, 

 with numerous but irregular branches; leaves lanceolate to lance-linear, nar- 

 rowed at the base, and with long and slender acumination, usually not much 

 over 0.5 mm long, non-decurrent, entire; costa faint or none; median cells 

 oblong-he.xagonal, 2-3:1, the alar quadrate and often wider than long: inner 

 perichaetial leaves entire; seta about 1 mm long; capsule slightly longer, oblong- 

 cylindric, usually erect; annulate; lid convex to conic; cilia rudimentary or none; 

 spores ripe in late summer or early fall. 



Bases of hardwood trees in moist, cool woods. Southeastern Canada to 

 Minnesota and south to Illinois, Ohio, Pennsylvania, and New Jersey. Not 

 yet reported from our region. 



3. Homo M allium (Schimper) Loeske 



Autoicous: slender, rarely somewhat robust, light to brownish or yellowish- 

 green, more or less shining; stems creeping, divided and irregularly pinnately 

 branched, with the branches short, erect, and more or less curved; leaves erect- 

 spreading or secund above, the lower mostly straight, the upper often curved, 

 concave, non-plicate, lance-ovate to ovate, the base narrowed and but little 

 decurrent, apex elongate-subulate, the margins plane, entire or serrate at apex; 

 costa none or short, thin, and double, or longer and sometimes forked; leaf- 

 cells narrowly prosenchymatous, smooth or with projecting ends, towards the 

 base shorter and a little wider, the alar numerous, small, quadrate, green, 

 passing rapidly into the narrower cells above; inner perichaetial leaves almost 

 sheathing, abruptly acuminate: seta 1-2 cm long, thin, compressed, reddish; 

 capsule inclined to horizontal, oblong, when dry and empty strongly curved 

 and narrowly constricted below the mouth; annulus revoluble; peristome-teeth 



