[Vol. 11 

 10 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



1874; Sacc. Syll. Fung. 6: 667. 1888; Patouillard, Tab. Anal. 

 Fung, l: 113. /. 25 4. 1884. Auriculariopsis ampla (Lev.) R. 

 Maire, Soc. Myc. Fr. Bui. 18: Suppl. 102. pi. 8,f. 22. 1902; Sacc. 

 Syll. Fung. 21: 423. 1912. Stereum pubescens Burt, Mo. Bot. 

 Gard. Ann. 7: 178. pi. 5. f. 50. 1920. 



Fructifications membranaceous, cup-shaped, sessile, white- 

 tomentose, the margin entire, free all around; hymenium veined, 

 fawn-color or bright brown; spores white, even, 6-10 X 3-4 pi. 



Fructifications 3-10 mm. in diameter, reflexed 1-3 mm. 



On Salix. Montana and Wyoming. April and May. Rare. 



In Europe, this fungus is more frequent on Populus. I de- 

 scribed the Montana gathering as Stereum pubescens with some 

 misgivings. A more recent collection from Wyoming has finally 

 enabled me to refer this species to Cytidia flocculenta, a reference 

 which I have confirmed by specimens kindly communicated to 

 me by Bourdot. Since C. flocculenta occurs in the United States 

 on Salix, gatherings in the past may have been referred to 

 the common Cytidia (Corticium) salicina, from which it differs 

 in smaller, more heavily tomentose pilei and much shorter 

 spores. 



Specimens examined: 

 France: Allier, H. Bourdot, 4726, and two unnumbered specimens; 



Aveyron, A. Galzin, 18021, comm. by H. Bourdot, 22632. 

 Montana: Sheridan, Mrs. L. A. Fitch, in Ellis Collection, 7014, 



type of Stereum pubescens (in N. Y. Bot. Gard. Herb., and Mo. 



Bot. Gard. Herb., 56784). 

 Wyoming: Boulder, F. S. Wolpert, comm. by J. R. Weir, 9742 



(in Mo. Bot. Gard. Herb., 56222). 



2. C. salicina (Fries) Burt, n. comb. 



Thekphora salicina Fries, Syst. Myc. 1 : 442. 1821. Corticium 

 salicinum Fries, Epicr. 558. 1838; Hym. Eur. 647. 1874; Sacc. 

 Syll. Fung. 6: 605. 1888; Massee, Linn. Soc. Bot. Jour. 27: 118. 

 pi. 6,f. 1. 1890. Lomatia salicina (Fr.) Karsten, Finska Vet.- 

 Soc. Bidrag Natur och Folk 48: 404. 1889; Icones Hym. Fenniae, 

 6. /. 10. 1885. An Cytidia rutilans (Pers.) Quelet in Rea, Brit. 

 Basid. 698. 1922? Plate 1, fig. 8. 



Type: authentic specimen from Fries in Kew Herb. 



