SCAPANIA. 215 



the postical, convex, oval-triangular, rotundate, appressed to the 

 stem, or upper margin slightly reflexed ; postical lobe oval-oblong, 

 rotundate, reflexed ; texture somewhat firm, epidermis verruculose, 

 several minute papillae on each cell; cells small to rather minute, 

 subquadrate, walls thick, angles thickened, no trigones. Bracts 

 rather larger than the upper leaves, lobes more equal, antical lobe 

 rotundate. Perianth projecting half beyond the bracts, com- 

 pressed, mouth wide, truncate, spinose-ciliate. Male stems more 

 slender, perigonial bracts enclosing leafy paraphyses with the 

 antheridia. Sometimes gemmiparous. 



Fruits April, May, June. 



Dimensions. — Stems 1 to 2 inches long, "5 mm. diam., with 

 leaves 5* mm. wide; branches '25 mm. diam., with leaves 

 275 mm. wide; leaves, antical lobe To mm. x 1* mm. ; postical 

 lobe 2*5 mm. x 1'75 mm., antical TS mm. x T mm., postical 

 2-5 mm. X 1-5 mm., antical 175 mm. x r25 mm., postical 

 2-25 mm. x 1-25 mm. ; cells '02 mm., -0175 mm. ; cilia of postical 

 lobe -05 mm.; bracts, antical lobe 2' mm. x 1*5 mm., postical 

 2*5 mm. x 1-5 mm. ; perianth 3"5 mm. x 2* mm. wide at the mouth, 

 lacinite of the mouth "275 mm., cilia of the same 1 mm. 



Hab. — Growing on limestone rocks. Somewhat rare. 2. Hill 

 above Studland, Dorset, E. M. Holmes, 26th April 1884. 7. Near 

 Aber, Carnarvonshire, G, E. Hunt, May 1868 (Herb. Spruce). 

 Tower Hill, Abergele, Denbighshire, IF. H. P., August 1892. 

 Llandulas, Denbighshire, IF. H. P., 1899. 9. Locally abundant 

 on limestone rocks in Lane. Silverdale, ./. A. Wheldon, July 1898. 

 Over Kellet, A. Wilson. 10. Bolton Woods, Yorkshire, Dr. Car- 

 rington, July 1877. 12. Yewbarrow, Westmorland, Geor//e Stabler, 

 Nov. 1869. 16. Moidart, West Inverness, S. M. MacDicar, 1899. 

 Eoshven, West Inverness, 8. M. Macoicar, 1899. 



I. Hill of Howth ; Co. Cavan ; Killarney ; cide B. McArdle. 



Found on the Continent (Sweden, Norway, Switzerland, 

 Germany, Austria, Italy). 



Obs. — In habit and general appearance similar to Scapania 

 nemorosa (L.), but in this latter species the leaves, both antical 

 and postical lobes, are usually rounder and margin ciliate or more 



