116 A .MANUAL OF MOSSES 



one-half the radius of the capsule: calyptra cucullate ; spores 

 mature in summer or early autumn: dioicous: fruit rare. 



On damp, shaded, usually non-calcareous rocks, in moun- 

 tains or hilly regions; in Europe, Asia, and in North America, 

 from Newfoundland to Alaska south to Alabama and Oregon. 

 To be looked for in the eastern part of our range. 



2. DRL-MMOXDIA Hooker. 



Autoicous or dioicous : slender, in low, dense, green, 

 scarcely shining, often extensive mats: stem long, creeping, 

 brown-radiculose, thickly covered with short, erect, simple or 

 furcate branches; leaves when dry stiffly appressed, when 

 moist erect-spreading to spreading, ovate-lanceolate to linear- 

 oblong, acute or obtuse, entire ; costa strong, almost per- 

 current ; cells uniformly rounded, smooth, chlorophyllose: 

 seta erect, long; capsule erect, symmetric, oval, smooth, when 

 dry shriveled ; annulus none ; peristome simple, inserted be- 

 low urn-mouth ; teeth lo, very short, truncate, entire, smooth, 

 densely trabeculate; spores very large (.08-. 10 mm.); round 

 or oval, several-celled, green, smoothish ; operculum obliquely 

 rostrate ; calyptra cucullate, large. 



A small genus of 6 species, on trees, rarely on rocks; 

 mostly Asiatic, one in our region. 



1. Drummondia prorepens [ Uridel] New Combination. 



(Anodontium prorepens Hridel ; Gymnostomum prorepens Hed- 

 wig ; Hypmim chrrclhituui Dillenius ; Orthotrichurn clarel- 

 latiini Hooker). 



(Plate XIV) 



Stems creeping, radiculose on the under side, with numer- 

 ous short, erect branches, 6-10 mm., forming dark green or 

 blackish tufts : leaves erect to spreading, oblong to ovate- 

 lanceolate, 1 to 1.5 mm. long, obtuse to acute, concave, cari- 

 nate, firm; costa strong, almost percurrent; cells small, thick- 

 walled, rounded; the alar often quadrate-inflated and hyaline 

 in the stem-leaves, the whole lower fourth of the perichsetial 

 leaves elongate-rectangular and hyaline: seta erect, about 2.5 

 mm. long, sinistrorse ; capsule ovate-globose, smooth, about 1 

 mm. high; operculum low-conic, obliquely long-rostrate; 

 peristome of 16 very short, wide, truncate, smooth, trabeculate 

 teeth, often more or less confluent; annulus none; calyptra, 

 at first conic, large, cucullate ; spores minutely roughened, 

 chlorophyllose, about .080-.095 mm., moderately incrassate, 

 mature in summer. 



On tree-trunks in woods, Japan, and in North America 

 from New England to Alabama, Missouri, and Ontario. 



Erie : Presque Isle, May 8-9, 1906. O. E. J. 



( Figured). 



