[Vol. 7 

 176 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



hyphae 3-3 1 m in diameter; no colored conducting organs, 

 gloeocystidia, nor cystidia present; spores hyaline, even, flat- 

 tened on one side, 6-7^X3-3^ fx. 



Fructifications 1-1 1 cm. in diameter, confluent along limbs 

 10 cm. and more, the reflexed portion 5-10 mm. broad, 3-10 mm. 

 long. 



In swampy woods on under side of dead twigs of Carpinus 

 caroUniana, recorded rarely on Liquidamhar and Nyssa. Can- 

 ada to Louisiana and westward to Missouri and in Mexico. 

 Throughout the year. Infrequent. 



Stereum sericeum is very appropriately named, for its silvery 

 to pale gray pilei are noteworthy by their silky or satiny luster; 

 they are smaller, thinner, and more flexible than those of *S. 

 rameale and with innate rather than fibrose-strigose fibrils; 

 these pilei lack the ruddy and ochraceous hues characteristic 

 of S. rameale; furthermore the pilei of S. sericeum are plane, 

 while those of S. rameale are folded laterally or crisped. Never- 

 theless I have received some scanty specimens of S. rameale 

 from the West and South which were sparsely developed and 

 bleached out so as to simulate S. sericeum. In New England 

 and New York, S. sericeum has been invariably on Carpinus 

 caroUniana when the substratum has been recorded, but else- 

 where S. rameale has sometimes been recorded on other substrata. 

 The concept of S. sericeum is that held by all American my- 

 cologists and is in conformity with the specimens in Curtis 

 Herbarium determined by Berkeley and Curtis who studied the 

 authentic specimen. 



Specimens examined: 

 Exsiccati: Ellis, N. Am. Fung., 19; Ell. & Ev., Fungi Col., 705; 



Ravenel, Fungi Car. i: 21; Shear, N. Y. Fungi, 312. 

 Ontario: London, J. Dearness; Ottawa, J. Macoun, 20, SO, 277; 



Toronto, G. H. Graham, Univ. Toronto Herb., 675 (in Mo. 



Bot. Gard. Herb., 44918), and T. Langton, Univ. Toronto 



Herb., 518, 594 (in Mo. Bot. Gard. Herb., 44842, 44848). 

 Vermont: Middlebury, E. A. Burt, five collections. 

 Massachusetts: Wayland, A. B. Seijmour, T23 (in Mo. Bot. 



Gard. Herb., 22097). 

 Connecticut: Goshen, L. M. Underwood, 22Jt. (in N. Y. Bot. 



Gard. Herb, and Mo. Bot. Gard. Herb., 56658). 



