74 A MAXUAL OF MOSSES 



teeth cleft to the base or nearly so into two filiform divisions, 

 inserted below the month of the urn, reddish ; lid as long as 

 the urn, subulate-rostrate, straight ; spores mature in late fall 

 or in winter : dioicous. 



On sandstone rocks, walls, turfy places, etc., usually in 

 hilly or mountainous regions. Europe, Asia, and, in North 

 America, from New Brunswick and Alaska south to Ohio and 

 Pennsylvania. Rare and usually sterile in our region. 



McKean : Rutherford Rocks, July 7, 1894, Hawkins, 

 October 18, 1895, Langmade Rocks, April 16, 

 1896, all in the vicinity of Bradford. D. A. 

 B. (Figured). 



2. Dicranodontium virginicum E. G. Britton. 



Lustrous, bright green : stems ascending to erect, below 

 red-tomentose ; leaves erect-spreading to secund, variously 

 straight to curled or twisted, often 5 mm. long, narrowly con- 

 cave-subulate from a short, thick, non-auriculate base, often 

 caducous, the caducous leaves usually with smooth points, the 

 persistent ones with serrulate points ; alar cells more or less 

 hyaline, the median and upper rectangular to quadrate, in- 

 crassate ; seta appearing lateral by growth of innovations, 

 flexuous, up to 2 cm. long, lustrous, yellow, arcuate to erect ; 

 capsule cylindric, 1.5 to 2 mm. long; peris tome-teeth deep red, 

 not deeply inserted, split about to the middle, papillose-striate 

 at base, sub-hyaline above ; no annulus ; lid subulate-rostrate, 

 >horter than the urn, straight or curved ; calyptra cucullate, 

 rostrate, covering only the upper third of urn ; spores small, 

 mature in summer: dioicous, antheridia terminal. 



At the southern border of our region, on sandstone 

 boulder along wooded path, Tibbs Run, Monongalia County, 

 West Virginia. C. F. Millspaugh. 



3. Dicranodontium millspaughii E. G. Britton. 



(Campylopus flc.vuosits Sullivant) 



Silky, cespitose, yellowish-green ; stems rufous-tomentose 

 at base, up to 3 cm. long ; leaves erect-spreading to secund, 

 up to 5 mm. long, from a broad, concave, non-auriculate base 

 narrowly tubulose-subulate ; costa strong, excurrent into a 

 linear tip, dentate marginally and dorsally ; alar leaf-cells large, 

 hyaline, mainly quadrate to shortly rectangular, extending to 

 the costa, above quickly smaller, incrassate, tending to fusi- 

 form-prosenchymatous towards the margin, shorter to quadrate 

 in the upper part of the lamina: seta cygneous, erect when old, 

 5-8 mm. long, stout ; capsule pyriform-cylindric, smooth, the 

 urn about 1 mm. long; peristome-teeth deeply inserted, red, 

 confluent at base, split to the middle or perforate to the base, 

 papillose-striolate below, paler above ; no annulus but the rim 



