[Vol. 1 

 358 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



slender, minutely downy, pale mouse-gray; hymenium colored 

 like the pileus, remotely ribbed, with the ribs radiating from 

 the stem, thin, branching; spores colorless, even, 5-7 x 4-5^ m. 



Fructification 2 cm. high; pileus 1 cm. broad, 13 mm. long; 

 stem 7 mm. long, | mm. thick, enlarging to 1 mm. where joining 

 the pileus. 



In moss. Labrador. August 8, 1908. 



The above description is based on the single dried specimen 

 collected by the Bryant Labrador Expedition. The small size, 

 regular obconic form, and very pale color of the membranaceous 

 pileus and the slender stem are characters making C. borealis 

 clearly distinct from other species of Craterellus. 



Specimens examined: 

 Labrador: Gready Harbor, Gready Island, Owen Bryant, type 

 (in Farlow Herb.) 



CYPHELLA 



Cyphella Fries, Syst. Myc. 2: 201. 1823. 



Fructifications somewhat membranaceous, cup-shaped, rarely 

 plane, adnate behind, commonly extended in stem-like form, 

 pendulous; hymenium typically concave or disk-shaped, defi- 

 nitely inferior in the pendulous species, even or at length rugu- 

 lose; basidia typically four-spored; spores subovate or globose, 

 hyaline, rarely colored. 



C. digitalis Fries is the type species of this genus. 



The fructifications of all our North American species are com- 

 paratively small, ranging in diameter from a fraction of a milli- 

 meter for some species to five to fifteen millimeters for those 

 of the largest species. The fructifications are produced on 

 the bark of small rotting twigs on the ground and on d?ad herb- 

 age, and can only be distinguished from small Pezizce by dem- 

 onstrating basidia rather than asci in the hymenium. This 

 demonstration is simply made by crushing under a cover glass 

 a portion of a fructification in water containing a little seven 

 per cent solution of potassium hydrate, and then examining 

 the preparation with the compound microscope. The basidia 

 are usually four-spored; in a few species I have as yet been able 

 to detect only two-spored basidia. 



Cyphella is closely related to Solenia by such species as C. 

 fasciculata and C. mellea, but is separated from it in such cases 



