Jennings: Manual of Mosses — 29. Leskeaceae 209 



onal, about three series in the rim much smaller and rounded; spores incras- 

 sate, yellowish, faintly papillose, about .011-. 014 mm, mature in spring. 



On the ground or on roots of trees in rather open woods; from New Eng- 

 land to Minnesota and Mexico, also in Europe. 



Rather common in our region. Now known from Beaver, Blair, Cambria (Porter), 

 Centre, Fayette. Huntingdon, and Westmoreland counties, all in the southern half of our 

 region. Specimen figured: Warrior's Ridge above Huntingdon, July 20 1908. O.E.J. 



2. Haplocl.^dium microphvllum (Swartz; Hedwig) Brotherus 

 (Hypnum gracile Bruch and Schimper; Thuidium microphyllum Best ) 



Plate XXXIX 



Medium size, pale green to yellowish, appressed-matted : stems diffusely 

 divided, densely pinnately branched; stem-leaves broadly ovate to lance-ovate, 

 up to 1.2 mm long, concave, long and narrowly acuminate, the margins entire 

 or sinuately denticulate; ccsta almost percurrent; leaf-cells quadrate-hexagonal, 

 somewhat incrassate, the apical and a very few of the basal elongate, all 

 strongly uni-papillate; branch-leaves narrower and smaller, up to 1 mm long; 

 paraphyllia numerous and branched on the stem but simple and few or none 

 on the smaller branches; inner perichaetial leaves high-sheathing, long-acu- 

 minate, costate, up to 2.5 mm long: seta up to 2 or 2.5 cm long, castaneous, 

 twisted, somewhat arcuate above; capsule turgid-oblong, about 2-2.5:1, about 

 2 mm long, dorsally somewhat turgid, when mature somewhat inclined or 

 pendent by the curving of the upper part of the seta; lid short-conic, mamil- 

 late; peristome normally hypnoid, the teeth yellowish, densely trabeculate, dor- 

 sally with rather indistinct lamellae and divisural, finely cross-striate, narrowly 

 hyaline-margined; segments carinate, about as long as teeth; cilia 2 to 3, a 

 little shorter than the teeth, strongly nodose to shortly appendiculate, the basal 

 membrane about one-third as high as teeth; annulus simple; spores mature in 

 summer, somewhat incrassate, pale brownish-pellucid, very slightly roughened. 



On earth, rotten wood, etc., often on bases of trees; Europe, Asia, and 

 from southern Canada to the West Indies. 



Rather rare in our region. Bedford Co.: Raystown Branch, Juniata River, l^/i mi. s. 

 of Schellsburg. July 19, 1941. C.M.B. Butler Co.: On roadside bank. Ribold. 

 C.M.B. June 2, 1945. Erie Co.: On dead log, Presque Isle. Nelle Ammons. July 13, 

 1935. McKean Co.: On hillside at mouth of Langmade Hollow, Bradford, November, 

 1895 (figured) and Limestone Creek, N. Y., near the Pennsylvania State line north of 

 Bradford, October 16, 1896. D.A.B. Washington Co.: On rotten log. Snake Woods, 

 near Washington. Aug. 13, 1892. Linn H. Simonton. 



10. Thuidium Bryologia Europaea 



Fern Mosses 



Autoicous or dioicous. slender to robust, mostly stiff, dull, forming 

 greenish to yellowish or brownish mats or cushions: stem with a few-celled 

 central strand, spreading to ascending or rarely erect, radiculose here and there 

 in fascicles, not much divided, once to thrice pinnately branched, flattened 

 like the frond of a fern; leaves dimorphic, when dry incurved or appressed, 



