Jennings: Manual of Mosses— 29. Leskeaceae 193 



3. Entodon seductrix (Hedwig) C. Mueller 



(Neckera seJuclrtx Hedwig; Cylindrothecium seductrix SuUivant ) 



Plate XXXVII 



Robust, widely cespitose in glossy yellowish-green mats: branches sub- 

 pinnately arranged, slender, julaceous, up to 2 or 2.5 cm long; leaves about 

 0.8-1.4 mm long, broadly oblong-elliptic to ovate, imbricate, deeply concave, 

 short-apiculate with the apiculation often reflexed, margin plane, entire, or 

 sometimes slightly serrulate, at base often slightly reflexed, base of leaf slightly 

 narrowed; costa short and double; median leaf-cells linear-to oblong-prosen- 

 chymatous, alar cells quadrate, slightly incrassate, forming a distinct group 

 sometimes extending along the m.argin for one-fourth the length of the leaf; 

 perichaetial leaves with a slender acumen, narrower and reaching a length of 

 about 3 mm: seta glossy, red-castaneous, erect, sinistrorse, about 1.5 cm long; 

 capsule 2-3 mm long, castaneous, about 5-6:1, cylindric, erect, symmetric or 

 slightly curved; exothecial cells yellowish with medium walls, rectangular to 

 irregularly oblong, towards the rim smaller, quadrate to laterally oblong in- 

 crassate, and formmg a rather indefinite annulus of 2 or 3 series; peristome- 

 teeth few articulate above, deeply inserted, lance-linear, rather short, bordered, 

 not transversely striolate but irregularly papillose, dorsal lamellae and divisural 

 strongly marked: segments nearly as long as teeth, narrowly linear-carinate, 

 free from teeth, arising from a very narrow basal membrane, smooth, cilia 

 none; operculum conic-rostrate, usually somewhat oblique, about 0.5-0.8 mm 

 long; calyptra small, enclosing only about half of the capsule; spores yellow- 

 ish-incrassate, about .014-018 mm in diameter, minutely roughened, mature 

 in late summer. Variable. 



On rotten logs, earth, rocks, roots of trees, etc.; from New England to 

 Minnesota and south to the Gulf States. 



Common in our region. Known from Allegheny. Armstrong. Beaver, Butler, Craw- 

 ford, Erie, Fayette, Greene, Huntingdon, Indiana (Porter), La;\Tence, McKean, Wash- 

 ington, and Westmoreland counties. Specimen/ figured: Charleroi. Washington Co., Oct. 

 13, 1906. O.E.J. & G.K.J. 



3a. Entodon seductrix var. minor (Austin) Grout 



Differs from the type in size, being only about one-half to two-thirds as 

 large, usually darker in color: capsule about 3-4:1, about 2 mm long; spores 

 usually about .010-. 015 mm in diameter. 



Allegheny Co.: Bark of decaying log, mixed oak and pine woods, Dutil Church, 

 Douthett, December 29, 1908. O.E.J. 



Family 29. Leskeaceae 



Autoicous or dioicous: slender to robust, mostly stiff, cespitose, bright or 

 dark green, when old brownish, dull or rarely sub-lustrous: stem mostly with- 

 out central strand, the primary stems mostly creeping, simple, pinnate, or vari- 

 ously branched, often stoloniform with distant and minute leaves; secondary 

 stems mostly erect simple, pinnate, or variously branched, both main and 



