216 A MANUAL OF MOSSES 



Allegheny : On base of white oak tree, Library, April 



29, 1909. O. E. J. (Figured). 

 Cambria : T. P. James. (Porter's Catalogue). 



Indiana : T. P. James. (Porter's Catalogue). 



Washington : Linn and Simonton. (Porter's Catalogue). 



3. Leucodon sciuroides [Linnaeus] Schwaegrichen. 

 (Hypmiin sciuroides Linnaeus; Fissidens sciuroides Hedwig). 



Rigidly cespitose, brownish to olive-green: secondary 

 stems terete and julaceous, more or less curved-ascending at 

 the ends, usually 3 or 4 cm. long; leaves densely crowded, 

 slightly secund, closely imbricate when dry, more or less open- 

 spreading when moist, lance-ovate, long and slenderly acumi- 

 nate, entire, usually about 5-plicate, somewhat decurrent ; costa 

 none; leaf-cells about as for L. brachyptis; perichsetial leaves 

 pale, non-plicate: seta about 7 or 8 mm. long, rather stout; 

 capsule oblong-elliptic, brown, exserted ; lid conic, same color 

 as urn; peristome-teeth slender, pale to whitish, remotely 

 articulate, entire or split towards the base; annulus simple, 

 falling away in fragments ; calyptra yellowish-brown apically, 

 reaching to the base of caspule; spores mature in spring but 

 capsujes very rarely found. 



On trunks of trees, or very rarely on rocks, in woods; 

 Europe, and from lower eastern Canada through the northeast- 

 ern United States. Not yet found in our region. 



2. FORSSTROEMIA Lindberg. 



(Leptodon Mohr). 



Autoicous, rarely dioicous; quite robust to slender, green 

 to brownish-green, mostly dull: leaves drying imbricate and 

 non-plicate or indistinctly plicate, when moist erect-spreading, 

 oblong to linear, short acute, also ovate and acuminate, margin 

 more or less revolute, entire or apex serrate ; costa rather 

 narrow, ending about the middle ; apical and median cells ellip- 

 tic or oval, the angular rounded-quadrate to transversely ob- 

 long : inner perichaetial leaves sheathing, long and narrowly 

 pointed, costate or ecostate : seta short, 2-5 mm., straight, red 

 to yellowish ; capsule mostly exserted, ovate to oval, pale or 

 reddish-brown ; annulus narrow or none ; peristome-teeth 

 lance-linear, mostly yellowish, pellucid, densely articulate, 

 finely papillose above, sometimes broken through on the di- 

 visural ; inner peristome none or very rudimentary ; sporeS 

 .020^.035 mm., yellowish-green, finely papillose; lid conic, nar- 

 rowly acuminate to shortly rostrate; calyptra cucullate with 

 erect hairs, rarely smooth. 



A widely distributed genus of 20 species, mostly arboreal 

 in habitat ; 4 species in North America; 1 species in our region. 



