Jennings: Manual of Mosses — 29. Leskeaceae 207 



uble; peristome-teeth lance-subulate, bordered, transversely striate, numerously 

 trabeculate; inner peristome yellow, finely papillose, basal membrane promi- 

 nent, carinate, the segments about as long as the teeth, carinately split, the 

 cilia 2 or 3, more or less complete, nodose; lid conic, short-rostrate; calyptra 

 cucullate; spores .009-. Oil mm. 



A genus of about 14 species, widely distributed in both hemispheres; 4 

 species in North America; 1 species in our region. 



1. Rauia SCITa (Beauvois) Austin 



(Thuidium scitum Austin; Hypnum scttum Beauvois) 



Plate XXXIX 



In appressed, green or yellowish-brown mats, medium-sized: stem prostrate, 

 castaneous, 2-3-times divided; densely pinnately branched; branchlets short 

 and slender, usually about 2-3 mm long, smooth, paraphylla present; stem- 

 leaves broadly cordate-deltoid, acuminate, about 0.5-0.6 mm long, margins 

 plane, finely papillose-denticulate; branch-leaves ovate-cordate, smaller, shorter 

 acuminate, both kinds of leaves concave, erect-spreading; costa pellucid, broad, 

 about three-fifths to four-fifths as long as the leaf; median leaf-cells rounded- 

 hexagonal, minute, .006 mm diameter, with 2-5 small bead-like papillae on 

 each surface, incrassate, rather obscure, the basal median oblong, paraphyllia 

 numerous, linear to ovate, more or less branched, occurring on both stem and 

 branches; irmer perichaetial leaves elongate-lanceolate, filiform-acuminate, 

 somewhat longitudinally plicate: capsule sub-erect, about 1.3-1.5 mm long, 

 rather thin-walled, when old and empty more or less wrinkled, urn cylindric, 

 straight or slightly curved, more or less twisted when old, the seta about 1.5 

 cm long; lid conic-rostrate, curved upward; annulus large; exothecial cells 

 rather thin-walled, mainly quadrate to rectangular; peristome-teeth lance-subu- 

 late, shallowly inserted, castaneous and transversely striolate below, hyaline 

 and papi'lose above; lamellate and trabeculate; segments nearly as long as 

 teeth, carinately partially split, the basal membrane about two-fifths as high, 

 the cilia usually three, nodose; spores medium-walled, castaneous-pellucid, 

 papillose, about .010-.013 mm, mature in fall and winter; autoicious. 



On the bases of trees fnd on stones in woods; from Ontario to Missouri, 

 eastward to the Atlantic Ocean and southward to North Carolina. 



Rare in our region. Allegheny Co.: Moon Twp., April, 1902. J. A. Shafer. Mc- 

 Kean Co.: On base of trees, Rutherford, August 4, 1897, Bradford, October, 1897; 

 Gates Hollow, July 28, 1895, and Limestone Creek, Bradford, October to December, 

 1896. D.A.B. (figured). The last named specimen issued with Grout's No. 134, in part, 

 North American Musci Pleuiocarpi. 



9. Haplocladium (C. Mueller) C. Mueller 



Autoicous: slender, forming mats, yellowish-green to brownish-yellow, 

 dull: stems creeping, elongate, with brownish rhizoids, variously pinnate with 

 branches mostly ascending, julaceous, short, obtuse and simple, or somewhat 

 longer, acute and pinnate with scattering short branchlets; leaves more or less 

 uniform, drying appressed, sometimes weakly secund, when moist erect- 



