1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 329 



Fructifications 5 mm.-3 cm. long, 5 mm.-13^ cm. wide. 



On wood and bark of fallen, rotten limbs of Carya. Middle- 

 bury, Vermont. July. Seen but once. 



This species is of felty or fibrillose structure like some species 

 of Hypochnus, not at all waxy, and of dull, olivaceous color so as 

 to be very inconspicuous on the fallen decaying limbs on which 

 found. So few species of Peniophora have spores up to 14 p. long 

 that the spore dimensions should prove in this instance an im- 

 portant character for recognition of P. medioburiensis. 



Specimens examined: 

 Vermont: Battell Ledge, Middlebury, E. A. Burt, type. 



98. P. subsulphurea (Karst.) v. Hohnel & Litschauer, K. 

 Akad. Wiss. Wien Sitzungsber. 115: 1580, 1592. 1906; Bourdot 

 & Galzin, Soc. Myc. Fr. Bui. 28: 388. 1913. 



Corticium subsulphureum Karsten, Soc. pro Fauna et Fl. Fen- 

 nica Meddel. 6: 12. 1881; Sacc. Syll. Fung. 6: 632. 1888; 

 Massee, Linn. Soc. Bot. Jour. 27: 148. 1890. Xerocarpus 

 subsulphureus Karsten, Finska Vet. -Soc. Bidrag Natur och Folk 

 37: 138. 1882; 48: 417. 1889. See v. Hohnel & Litschauer, 

 K. Akad. Wiss. Wien Sitzungsber. 117: 1093. 1908. Corticium 

 subincarnatum Peck, N. Y. State Mus. Rept. 42: 122. 1889; 

 Sacc. Syll. Fung. 9: 232. 1891. 



Type: authentic specimen in Burt Herb., and specimen cited 

 by Karsten in Roumeguere, Fungi Gall., 4307. 



Fructifications longitudinally effused, adnate, at first citron- 

 yellow, soon cinnamon-buff, even, pulverulent, the margin 

 thinning out, citron-yellow; in section 150-400 (x thick, with the 

 hymenial layer and that next to the substratum usually slightly 

 colored, the hyphae suberect and branching or loosely interwoven, 

 thin-walled, hyaline, 3-4 \l in diameter, nodose-septate, not in- 

 crusted except perhaps with a few minute grains in the sub- 

 hymenium; hymenium becoming 2-layered; cystidia hair-like, 

 thin-walled, even or with a few incrusting granules, 4-5 y. in 

 diameter, protruding up to 40 ja; spores white in spore-collection, 

 4-53^ X 2-2y 2 {x. 



Fructifications 4-10 cm. long, 1-3 cm. broad. 



On decaying decorticated wood of Pinus and Abies in mountain 



