170 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



H. CORRUGATA (Fr.) Lev. 



On decorticated limb Betula lenta, Grant Co., near Bayard 

 (Millspangh). On Magnolia Fraseri, Feb. 8, 1894. Setae 38 x 

 7.5 IL (Nuttall, 1364). 



H. unicolor B. & C. ? 



On Betula lenta, on dead Kalmia latifolia? July i, 1893 (Nutt- 

 all, mi, 96). 



CORTICIUM Fr. 

 C. salicinum Fr. 1 



On dead Salix nigra, March 15, 1894 (Nuttall, 1401). 



C. Oakesii B. & C. 



On living Ostrya Virginica, March 21, 1893 {Nuttall, 877). 



C. globiferum E. & E. 



Underside of dead log in deep laurel thicket, Short Creek, 

 March 25, 1893 (Nuttall, 940). 



C. arachnoideum Berk. 



On dead damp twigs in dense pile, Jan. 18, 1894. Diffused for 

 30 x 8 cm. Spores 4 to 5 x 2 to 3 //.. The species when fresh 

 has a wrinkled or crusted appearance looking very like a Meru- 

 lius, but soon becomes flat and plane (Nuttall, 1344, 303). 



C. radiosum Fr. 



On dead trunk, partly .beneath loose bark, Short Creek, May 

 1 8, 1893 (Nuttall, 965). 



C. leve Pers. 



On Hamamelis Virginica, Dec. 20, 1894 (Nuttall, 1500). 



C. albo-flavescens E. & E., sp. nov. 



TYPE HABITAT: On bark of dead Tsuga Canadensis, Feb. 24, 

 1894 (Nuttall, discov. 1394). 



At first orbicular, subpezizoid, i to 2 mm. diameter, becom- 

 ing more irregular in shape and i cm. or more diameter, 

 lower stratum milk-white, consisting of loosely interwoven, 

 branching threads, and extending out beyond the pale-olivaceous 

 or yellowish, membranaceous hymenium so as to form a thin sub- 

 fimbriate, white margin. Spores abundant, globose, with a sin- 

 gle large nucleus, 4 to 6 n diameter, slightly colored. 



The hymenium has only a slight tinge of olive and is perhaps 

 better described as light-drab color. 



C. leptaleum E. & E., sp. nov. 



TYPE HABITAT: On under side dead sapling Magnolia Fraseri, 

 alt. i, 800 ft. April n, 1895 (Nuttall, discov. 1803, 690). 



Thin, closely adnate, grayish-white, pulverulent, soon cracking 

 into areas 2 to 3 mm across, with margins incurved so as to re- 

 semble the shallow cups of some Peziza. Spores oblong, hyaline, 

 continuous, 10 to 12 x 4 //, borne on cylindrical basidia 30 to 40 

 x 6 IL, with two stout sporophores. There are also other smaller 



