[Vor. 5 
344 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Venezuela: Margarita, A. F. Blakeslee, comm. by W. G. 
Farlow. 
Brazil: Blumenau, А. Möller, comm. by J. Bresadola, under 
the name Hymenochaete fuliginosa, as listed in Hedwigia 
35 : 289. 1896. 
20. Н. agglutinans Ellis, Torr. Bot. Club Bul. 5: 46. 1874; 
Sace. Syll. Fung. 6: 602. 1888; Massee, Linn. Soc. Bot. Jour. 
27: 106. 1890; Graves, Mycologia 6 : 279. pl. 145. 1914. 
Hymenochaete ambiens Berk. & Curtis in Cooke, Grevillea 
8:147. 1880; Sace. Syll. Fung. 6:596. 1888; Massee, Linn. 
Soc. Bot. Jour. 27 : 106. 1890. 
Type: probably in N. Y. Bot. Gard. Herb. 
Fructifications resupinate, effused, adnate, orbicular, at 
first of loose texture and cream-buff, then thick, very com- 
pact, concentrically suleate, and antique brown, with the 
margin thick, determinate, and cream-buff, finally becoming 
black during the winter, infecting living limbs where they rub 
together and finally uniting them firmly; in structure 1-2 
mm. thick, composed of a single homogeneous hyphal layer 
of densely interwoven, thick-walled hyphae concolorous with 
the fructification and bearing at the outer surface of this layer 
an opaque subhymenium upon which the setae stand; setae 
70-909 u, protruding 60 и, few, scattered, starting from the 
subhymenium; basidia and spores not found. 
Fructifications 3-7 cm. in diameter, 1-2 mm. thick. 
Infecting living branches of ‘Alnus, Benzoin, Acer, ete., 
where they rub together. August to April. New Hampshire 
to Florida, westward to Idaho, and in Cuba. Frequent. 
This species is easily recognized by its remarkable habit 
of joining together branches which have rubbed together and 
formed areas for infection. From these areas the fructifica- 
tion spreads so as to often encircle one or both limbs, at the 
same time killing the portions of the limbs beyond the fructi- 
fication, as described by Graves in his article cited above. 
Specimens examined: 
Exsiecati: Ellis, N. Am. Fungi, 939; ЕП, & Ev., Fungi Col., 
807; de Thümen, Mye. Univ., 309. 
