Jennings: Manual of Mosses — 32. Fabroniaceae 281 



1. Anacamptodon splachnoides [Froelich] B.idel 



{Campylodontium hypnoides Schwaegrichen; Neckera splachnoides Schwaegrichen) 



Knot-Hole Moss 



Plate XXXVII 



Dark-green or bluish-green, small, delicate, thinly tufted: stems creeping, 

 with erect branches; leaves lance-ovate, up to 1.5 mm long, acuminate, entire, 

 plano-concave, chlorophyllose, soft, closely imbricated when dry, non-decurrent, 

 non-plicate; costa rather slender, reaching to above the middle of the leaf; 

 median leaf-cells rhombic-hexagonal, about 3-5:1, with a few quadrate and sub- 

 inflated cells at the base; perichaetial leaves few: seta about 6-8 mm long, sinis- 

 trorse when dry; capsule erect and symmetric, about 2:1, oval-oblong, thick- 

 necked, constricted below the mouth when dry; peristome double, teeth approx- 

 imately in pairs and reflexed when dry; 16 in number, lanceolate, pale, articu- 

 late, the divisural zigzag; segments filiform, about one-half to two-thirds as 

 long as teeth; no basal membrane; annulus none; exothecial cells castaneous- 

 incrassate, rectangular or irregularly oblong, above smaller and quadrate, those 

 at the rim minute and rounded; lid short-rostrate from a conic base, more or 

 less oblique, one-half to two-thirds as long as the urn; calyptra whitish, cover- 

 ing only the upper part of the urn; spores about .010 mm, minutely papillose, 

 yellowish-green, medium-walled, mature in June. 



In moist cavities in decaying wood, knot-holes in trees, in forks of tree- 

 trunks, etc.; Europe, Asia, and from New England to Illinois and south. 



Collected but seldom in our region, and then only in small quantities. Fayette Co.: 

 In knot-hole 20 feer up in a beech tree, Tates Hollow. Dec. 1, 1933. John Lewis. In- 

 diana Co.: T. P. James. (Porter's Catalogue). McKean Co.: Bradford, different 

 dates, in cavities in decaying wood. D.A.B. (figured). Issued as No. 148. Grout's 

 North American Musci Pleurocarpi. Somerset Co.: Near Trent. Aug. 19, 1933. 

 Chas M. Hepner. Washington- Co.: In knot of a beech log, near Washington, Sept. 

 15, 1891. Linn &C Simonton. 



3. Schwetschkeopsis Brotherus 



Dioicous: slender, soft, forming tufts, green to yellowish: stem long, creep- 

 ing, radiculose, mostly densely and symmetrically pinnately branched; branches 

 somewhat julaceous to complanately-leaved, obtuse, short to long, ascending, 

 simple or branched; branch-leaves when dry imbricate, when moist erect-spread- 

 in, non-decurrent, concave, plicate, lance-ovate, acuminate to subulate-pointed, 

 serrulate, plane-margined; costa none; leaf-ceils oblong-oval to oblong-linear, 

 dorsally papillose above, alar quadrate and numerous, chlorophyllose, occupy- 

 ing most of leaf-base: seta up to 7 mm long, slender, tortuous, yellowish-red, 

 smooth, when dry twisted; capsule oblong-ovoid, mostly erect and symmetric, 

 shortly collumate; exannulate, peristome double, teeth lanceolate, yellow, with 

 zigzag divisural, densely transversely striate, closely tra'^eculate; in:'er peri- 

 stome hyaline, basal membrane one-third as high as teeth, smooth, segments 

 about as long as teeth, broad, split along keel, finely papillose, cilia rudimen- 

 tary or none; spores about .015 mm; lid obliquely rostrate. 



