[Vol,. 8 

 328 ANNALS OF THE MISSOUEI BOTANICAL GARDEN 



diameter, very dense at the outer surface witli tlio hyplial 

 branches or i3ara]:)liyses 2ti in diameter, curved longitudinally 

 along the surface and densely interwoven; erect probasidia 

 nearly hyaline, rich in jn-otoplasm, deeply staining, pyriform, 

 12-20 X 8-15/i., are borne laterally on the hyphae about 15/x 

 below the surface of the hymenium ; spores white in a spore 

 collection, simple, even, curved, 17-22 X 4-5/a, are borne 

 singly from each of the upper three cells (so far as observed) 

 of a straight or fiexuous, few-celled, liyaline organ up to 

 60 X 5-5i/2Mj which grows from the probasidium and pro- 

 trudes above the surface of the hymenium. 



Fructifications 2-15 cm. long, 1-8 cm. broad, 1-1^/^ mm. 

 thick. 



On small, living branches of apple, orange, oak, Nyssa, 

 Cornus, Liquidambar, and also on orange leaves in one col- 

 lection; sometimes, perhaps always, associated with scale 

 insects. Canada to Florida and Louisiana and westward to 

 Wisconsin; also in Cuba and Porto Eico. December to Au- 

 gust ; spores produced in the last of May. 



S. yseudopedicellatum is the common Septohasidium of 

 southeastern United States. It may be recognized by its 

 brown, glabrous, shining, foliaceous crust which is raised 

 and supported about a millimeter above the substratum on 

 perpendicular, hyphal pillars which are as conspicuous as the 

 rhizoids of a lichen. Old specimens may crack, break the 

 hyphal pillars, and the hymenial crust curl outward so as 

 to show the broken pillars attached to the under side. Sterile 

 specimens of this species have been heretofore referred to 

 8. pedicellaium, but a collection of fertile sj^ecimens received 

 from Dr. R. P. Burke in May of the jjresent year shows that 

 our common species differs from 8. pedicellatuni by having 

 large spores produced on a straight or but slightly curved, 

 much larger, spore-bearing organ, paraphyses or hyphal 

 branches at the surface of the hymenium curved and densely 

 longitudinally interwoven, larger probasidia, and larger and 

 thicker fructifications. Even in sterile condition the longitu- 

 dinally interwoven paraphyses are sufficiently distinctive. 



