Jennings: Manual of Mosses — 31. Hypnaceae 267 



Cambria Co.: Wiltmore. T. P. James. (Porter's Catalogue). McKean Co.: Near 

 Bradford. D.A.B. WASHINGTON Co.: McCracken Sta., W. & W. Ry., Oct. 21, 1893. 

 Linn & Simonton (figured). 



9. Stereodon Haldanianus (Greville) Lindberg 



(Hypnitm Haldianum Greville; Heterophyllon Haldani 

 Kindberg; Hypnum pulchrum Hooker) 



Plate L 



Widely and loosely cespitose, dark to brownish-green: stems long, creeping, 

 irregularly pinnate, the branchlets unequal and disposed much as in some of 

 the Brachytheciae; leaves loosely and more or less evenly imbricate to loosely 

 spreading; stem-leaves usually decurrent, about 0.7-1.5 mm long, oblong-ovate 

 to somewhat lanceolate, rapidly narrowed to a short and acute apex, entire, 

 plane-margined, concave; branch-leaves lance-ovate to lanceolate, about 0.5-1.5 

 mm long, short-acuminate, otherwise similar to the stem-leaves; median leaf- 

 cells linear-flexuose, about 12-20:1, prosenchymatous, the alar inflated, rather 

 incrassate, large, forming a quite distinct auricle, bordered above by a few 

 considerably smaller and chlorophyllose cells; costa rudimentary or none, or 

 double and short; perichaetial leaves spreading, abruptly filiform-acuminate, 

 the inner non-plicate; paraphyllia large and numerous: seta about 2 cm long, 

 lustrous, castaneous, when dry sinistrorse; capsule long-cylindric, dull-castane- 

 ous, curved, sub-erect to more or less inclined, about 4-6:1, urn about 2.5-3 

 mm long, the lid conic and obliquely short-rostrate; peristome-teeth confluent 

 at base, transversely striolate and yellowish below, strongly trabeculate, the 

 divisural and the dorsal lamellae usually faint; segments slightly carinately 

 cleft, below more or lei>s faintly transversely striolate-papillose, above papillose, 

 about as long as the teeth; cilia usually single and shorter, sometimes two and 

 rudimentary, or sometim.es none, articulate; spores granulose, yellowish-brown, 

 somewhat incrassate, about .015-.016 mm, mature in late fall or winter. 



On earth, humus, rocks, rotten logs, etc., in woods; Europe, Asia, and, in 

 North America, from Nova Scotia to Montana and southwards to the Gulf 

 States. 



Common in our region. Known from numerous collections from the following coun- 

 ties: Allegheny, Armstrong, Beaver, Butler, Cambria (Porter), Crawford. Elk (Porter). 

 Erie, Fayette, McKean, and Somerset. Specimen figured: Wildwood Road Hollow, Alle- 

 gheny Co., Nov. 19, 1908. O.E.J, and G.K.J. 



10. Stereodon recurvans [Richard] Brotherus 



(Hypnum recurvans Schwaegrichen: Sematophyllum recurvans E. G. Britton; 



Leskea recurvans Richard; Rhapidostegium recurvans Bryologia 



Europaea; Brolherella recurvans Fleischer) 



Plate LI 



Very glossy, widely cespitose in flat tufts, usually yellowish-green: stems 

 prostrate, reddish, irregularly pinnate; leaves about 1.2-1.5 mm long, strongly 

 complanately falcate-secund, close, imbricate at base, soft, thin, more or less 



