Jennings: Manual of Mosses — 29. Leskeaceae 205 



tral strand small but distinct; leaves incurved-appressed when dry, spreading 

 when moist, about 0.8-1.2 mm long, from an ovate base narrowed above to a 

 rather blunt apex, concave, margins plane or incurved, entire or serrulate; 

 costa ending a little below the apex; median leaf-cells quadrate-hexagonal, 

 about .C08-.010 mm wide, with several small papillae on the lower surface, 

 on the upper surface less papillose or almost smooth, apical and basal cells 

 somewhat wider and shorter, the alar oblong-quadrate, longer towards the 

 costa; branch-leaves similar; perichaetial leaves long-sheathing, rather laxly- 

 celled, costate; seta about 1.5-2 cm long; capsule erect, straight, short-cylindric, 

 sometimes slightly curved, more or less wrinkled and contracted below the 

 mouth when dry; lid conic, rather obtuse; peristome-teeth yellowish, papillose; 

 segments linear, slender, partly carinately cleft between the articulations, 

 shorter than the teeth, arising from a basal membrane about one-fifth the 

 length of the teeth; spores mature in early summer; annulus 2-seriate. 



On stones, roots of trees, logs, etc., often where sometimes overflowed; 

 Japan, and from New Brunswick to Ontario and southwards through the 

 eastern and central part of the United States. Probably fairly common in 

 our region, but sometimes difficult to distinguish from L. polycarpa or L. 

 gracilescens. 



Allegheny Co.: On bark of white oak at three feet from ground. Fern Hollow, 

 Pittsburgh, March 8, 1908, and at base of trees in swampv woods near Douthett, Decem- 

 ber 29, 1908. O.E.J, (figured Plate XXXIX). Beaver Co.: On decaying bark, 3 mi. 

 east of Legionville, along Sewicklev Creek. May 5, 1918. O.E.J. Blair Co.: Tyrone. 

 T. P. James. (Porter's Catalogue). Cranxford Co.: On bark, Ulmtif americana. Con- 

 neaut Outlet. C.M.B. Sept. 23, 1949. McKean Co.: Tuna Creek. Bradford. Dec. 21, 

 1895. D.A.B. Tioga Co.: On large Elm tree, Goodrich Settlement, Tioga. June 24, 

 1935. Sidney K. Eastwood. Washington Co.: On tree, subject to inundation, near 

 Washington. May 28, 1892; near Arden, July 20, 1891; and at Hackberry Sta., June 

 16, 1894. All by Linn &: Simonton. Westmoreland Co.: Chestnut Ridge, s.e. of 

 Torrance. C.M.B. June 13, 1943. 



7. Leskeella (Limpricht) Loeske 



Dioicous: slender, in flattened, wide-spreading mats, dark green to brown- 

 ish, dull; stem widely creeping, fasciculately yellowish-red-radiculose, densely- 

 leaved, numerously-branched, with erect and short branches; leaves drying 

 imbricate, when moist trect-spreading to secund, more or less abruptly long- 

 acuminate from a decurrent, doubly-plicate, cordate base, margins narrowly 

 revolute below but plane in the acumen, entire; costa strong, yellow-brown, 

 ending in the acumen; cells rounded-hexagonal, in leaf-middle oval and oblong, 

 in middle of base rectangular, the alar quadrate; branch-leaves smaller with 

 plane margins and delicate and shorter costa; perichaetial leaves pale, from the 

 erect and half-sheathing base abruptly long-acuminate, delicately costate to 

 the acumen: seta elongate, stif?, dark chestnut-color, smooth; capsule erect, 

 symmetric, cylindric or oblong, rarely weakly curved, finally rust-colored to 

 brown; annulus rather persistent, deciduous in sections; peristome-teeth erect 

 when dry, confluent at base, subulate, bordered, yellowish, cross- and obliquely- 

 striate, smooth or papillose above, not distinctly trabeculate; inner peristome 

 finely papillose, basal membrane moderately prominent, segments irregular, in 



