216 A MANUAL OF MOSSES 



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



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



Cambria 



Indiana 



Washington 



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

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

 Linn and Simonton. (Porter's Catalogue). 



3. Leucodon sciuroides [Linnaeus] Schwaegrichen. 

 (Hypuuui scinroides 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. brachypus; perichaetial 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 

 capsules 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 regiqn. 



