212 



[Vol. 3 



ANNALS OF THE MISSOUKI BOTANICAL GARDEN 



Fig. 4 



H. canaden- 

 sis. Cystid- 

 ium, spore 

 X640. 



hymenium even or granular ; in structure 400-500iLi thick, com- 

 posed (1) next to the substratum of a few dark-colored, 

 longitudinally arranged, nodose-septate hyphae 

 4- 4%/A in diameter, and (2) towards the hymen- 

 ium of pale, thin and even-walled hyphae about 

 2%-3/A in diameter, suberect, very loosely inter- 

 woven, which arise as lateral branches from the 

 dark basal hyphae and bear basidia and cystidia ; 

 cystidia septate, cylindric, obtuse, even-walled, 

 Saccardo's umber in color under the microscope, 

 4l^-5/A in diameter, emerging up to 80-100/a ; basi- 

 dia 4-spored with the spores on slender sterig- 

 mata about 6/* long ; spores Saccardo 's umber un- 

 der the microscope, globose, tuberculate, spore 

 body 6-7 fi in diameter. 



Fructification usually 1-2 cm. long, %-l cm. 

 broad, one specimen 4 cm. long. 



On wood and bark of conifers decaying on the 

 forest floor. Canada and New Hampshire to Ida- 

 ho and British Columbia. August to November. 

 H. canadensis is a little darker in color than H. ferrugineus 

 and is smaller and less conspicuous in the few collections 

 which have been made. It differs from our other rust- 

 colored species of Hypochnus in having cystidia. It is re- 

 lated to the European Hypochnus femiginosus (v. Hohn. 

 & Litsch.) Burt, n. comb., =: Tomentellina ferruginosa v. 

 Hohn. & Litsch, by the colored, cylindric cystidia, but the 

 cystidia of our species are shorter and its hyphae finer, 

 darker, and nodose-septate next to the substratum. 



Specimens examined: 

 Canada: locality not stated, J. Macoun, 11, 

 Quebec: Ironsides, J. Macoun, 277b, 

 New Hampshire: Chocorua, W. G. Farlow, 2, and c4 (the 



latter in Mo. Bot. Gard. Herb., 44039). 

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

 Michigan : Ann Arbor, C, H. Kaufman, 36. 

 Idaho : Priest Eiver, J. R. Weir, 1. 



British Columbia: Kootenai Mountains, near Salmo, J. R. 

 Weir, 504 (in Mo. Bot. Gard. Herb.). 



