432 MuRRiLL : Polyporaceae of North America 



12. Scutiger Whiteae sp. nov. 



A plant of medium size, growing in clusters, with yellowish- 

 brown pileus and tubes that are white when fresh and rose-colored 

 when dry. Pileus subcircular in outline, convex, depressed at the 

 center, 8-12 x 0.5-1 cm.; surface pruinose, velvety to the touch, 

 isabelline to fulvous, margin acute, at first inflexed, irregularly 

 undulate at maturity: context fleshy-tough, 0.2-0.5 cm. thick, of 

 nutty flavor, rose-tinted when dry, dark red next to the tubes ; 

 tubes 0.1-0.3 cm. long, 3 to a mm., very decurrent, white when 

 young and fresh, rose-colored when bruised or dried, mouths cir- 

 cular or subcircular, edges thin, fimbriate : spores ovoid, hyaline, 

 smooth, copious, 3.5 x 5/^: stipe short, usually excentric, en- 

 larged at the base, 3 x 2-zi. cm., concolorous, tough : plants caes- 

 pitose, often confluent at the base, all stages of development being 

 found in one cluster. 



A fine collection of this species was made by Miss V. White 

 at Bar Harbor, Maine, in August, 1901. The plant was found 

 growing among moss on a damp river bank and seemed to her 

 to resemble Hydmnn rcpandnm in general habit. Accompanying 

 the specimens are excellent field notes and drawings in water 

 colors. 



Plants sent to Kew as P. ovinus by F"arlow from New Hamp- 

 shire seemed to me to agree with Miss White's specimens, but no 

 special study of them was made. A few other stray American 

 plants in foreign herbaria lead me to think that this species may 

 possibly range as far south as Ohio, but that its proper home is 

 in New England. 



Porodiscus gen. nov. 



Hymenophore small, annual, tough, epixylous, erumpent from 

 the lenticels of dead branches ; stipe attached to the vertex of the 

 pileus, usually curved at maturity ; context white, fibrous, tubes 

 cylindrical, short, one-layered, mouths constricted ; spores globose, 

 smooth, hyaline. 



The type of this genus is Polyporiis pocula (Schw.) Berk. & 

 Curt., first described by Schweinitz as Pcziza pendida and later as 

 Sphaeria pocula. By Fries it was first assigned to the genus 

 CypheUa and later formed the basis of the new Friesian genus 

 Enslinia, which name, however, was preoccupied by Enslinia 

 Rchb. The fruit body matures slowly and resembles a discomy- 

 cete in its early stages, hence the confusion in regard to its sys- 



