Jennings: Manual of Mosses — 34. Brachytheciaceae 295 



On wet rocks in or at the margin of streams, swamps, or in wet pLices in 

 ravines, usually where often submerged; Europe, Asia, and from Canada to 

 Missouri and Virginia. Rather rare in our region. Quire variable with a 

 number of named varieties. 



Now known from the following counties: Allegheny, Beaver, Butler, Cambria (Por- 

 ter), Crawford, Erie. Fayette. McKean, Somerset, Warren, Washington, and Westmore- 

 land. Specimen figured: Pymatuning Swamp, Lmesville, Crawford Co., May 10-11, 1906. 

 O.E.J. 



8. Br.^chythecium reflexum [Starke] Bryologia Europaea 



{Hypnum reflexum Starke; H. subtenue ]ames\ Thuidium laxifolium Macoun ) 



Very slender, dark green, densely intertwining to form low, flat patches: 

 the branches short, delicate, often curved, more or less pinnatelv arranged; 

 stem-leaves cotdate-triangular, quickly narrowed to a fine, long, often twisted 

 acumen, strongly decurrent, minutely serrulate all around; branch-leaves nar- 

 rower, lanceolate, strongly decurrent, serrulate, smooth to faintly plicate, 

 margins plane to very narrowly recurved, when dry spreading or imbricate and 

 rendering the branches rather julaceous; costa strong, reaching to apex or even 

 mto the acumen; leaf-cells short and broad, about 3-8:1, rhomboid-fusiform, 

 sub-obtuse, rather incrassate, towards the basal angles becoming gradually 

 shorter and broader, the alar large, pellucid, rounded-quadrate to rounded- 

 rectangular, numerous and extending up the sides of the leaf but not forming 

 very clearly distinct auricles: seta slender, about 1-1.5 cm long, rough; capsule 

 small, about 2 mm long, about 2:1, ovate-globose, curved, dorsaliy turgid, 

 abruptly horizontal, almost black when old; lid convex-conic, apiculate; annu- 

 lus narrow, 2-seriate; cilia slender and appendiculate; spores mature in winter: 

 autoicous. 



On rocks and tree-trunks in mountainous or hilly regions; Europe, Asia, 

 and from Garrett Countv, Maryland (J. Donnell Smith), and westward. 



Rare in our region. McKean Co.: Bradford. D. A. Burnett. (Porter's Catalogue). 



9. Brachythecium Starkei [Bridel] Bryologia Europaea 



(Hypnum Starkei Bridel) 



Plate LVI 



Dark green, widely and thinly cespitose, the plants usually quite distinctly 

 complanate: stems slender, creeping, radiculose, pinnate v/ith short, curved- 

 sscending, rather distant, slender branches; branch-leaves loose, divergently 

 spreading, often somewhat secund, those from the middle of the branches 

 broadly ovate to broadly triangular-cordate, abruptly and usually rather shortly 

 slender-acuminate, apically twisted, broadly decurrent, marginally serrate 

 above, denticulate below; costa variable but usually about three-fourths as long 

 as the leaf; median leaf -cells about 8-15:1, fusiform-hexagonal to fusiform- 

 rhomboid, sometimes shorter, somewhat incrassate; the basal in one or two 

 rows more or less rectangular-oblong, the alar rather numerous, sub-rectangular, 

 with thick and often brownish or yellowish walls, forming quite disitnct auri- 



