170 Field Columbian Museum— Botany, Vol. i. 



H. coRRUGATA (Fr.) Lev. 



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

 {Millspaugh). On Magnolia Fraseri, Feb. 8, 1894. Setae 38 x 

 7.5 // {Nuttall, 1364). 



H. unicolor B. & C. ? 



On Betula lent a, on dead Kalinia latifolia? July i, 1893 [Niitt- 

 all, mi, 96). 



CORTICIUM Fr. 

 C. salicinum Fr. 



On dead Salix nigra, March 15, 1894 {A^utiall, 1401). 



C. Oakesii B. & C. 



On living Osirya 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 

 18, 1893 {Nuttall, 965). 



C. leve Pers. 



On Hainamelis Virginica, Dec. 20, \'6<^\ {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 /^ 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. 1,800 ft. April 11, 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 //, with two stout sporophores. There are also other smaller 



