314 A MANUAL OF MOSSES 



9. Stereodon recurvans [Richard] Brotherus. 



{Hypnum recurvans Schwaegrichen ; Sematophyllum recurvans 

 E. G. Britton ; Leskea -recurvans Richard ; Rhaphidostegium 

 recurvans Jaeger). 



(Plate XLVII) 



Very glossy, widely cespitose in flat tufts, usually yellow- 

 ish-green : stems prostrate, reddish, irregularly branching ; 

 leaves about 1.2-1.5 mm. long, strongly complanately falcate- 

 secund, close, imbricate at base, soft, thin, more or less con- 

 cave, lance-ovate, slenderly long-acuminate, non-decurrent, 

 more or less sharply serrate at the apex, the margin often nar- 

 rowly recurved below; costa obsolete, or very short and 

 double ; perichsetial leaves gradually long-acuminate, serrate 

 at apex; median leaf-cells linear-flexuose, the basal yellowish 

 or brownish, shorter, wider, the alar consisting of a group of 

 4 to 8 hyaline or colored, much inflated and enlarged cells 

 forming a group bordered above by a few sub-quadrate and 

 smaller cells: seta about 1.5-2 cm. long, lustrous, castaneous, 

 somewhat sinistrorse; capsule oblong-oval, slightly curved, 

 obliquely inclined to almost horizontal, the urn about 3-4:1, 

 about 1.5-2 mm. long, light castaneous, the tapering base 

 darker, the urn when old strongly arcuate; annulus present; 

 lid conic and together with the slender beak about one-half 

 the length of the urn; peristome hypnoid, the teeth large, 

 strongly trabeculate, the divisural faint, the thin dorsal lamellae 

 transversely papillose-striolate ; segments about as long as 

 teeth but usually not splitting, the basal membrane about two- 

 fifths as long, the cilia usually one, sometimes two, slightly ap- 

 pendiculate, somewhat shorter than the segments; spores 

 .016-.018 mm., medium-walled, granulose, brownish, mature in 

 late fall, the capsules often remaining in good condition until 

 early spring: dioicous. 



On soil, humus, bases of trees, logs, etc., in moist woods, 

 mainly in mountainous or hilly regions ; from Newfoundland 

 to Manitoba and south to North Carolina and Missouri, also 

 in Mexico. Very common in our region. 



Allegheny : Near Pittsburgh, August, 1905. O. E. J. 



Armstrong : Kittanning, September 24, 1904. O. E. J. 



Butler : Winfield Junction, May 26, 1906. O. E. J. 



Crawford : Linesville, May 13, 1905, and June 11-12, 



1907. O. E. J.; Hartstown, May 29-31, 

 1909. O. E. J. and G. K. J. 



Elk : McMinn. (Porter's Catalogue). 



Fayette : Ohio Pyle, September 10, 1905, and four 



miles south of Ohio Pyle, September 1-3, 

 1906. O. E. J. and G. K. J.; (Figured); 



