CLINTON: NORTH AMERICAN USTILAGINEAE. 
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of a new genus, Poikilosporium. Recently Griffiths also described 
it as anew species. McClatchie (Proc. S. Calif. Acad. Sci., 1: 373) 
states that the host of the Holway-Dietel species is not Atriplex but 
Bigeloma veneta. The writer has seen the specimen of T. pilulae- 
formis in the Curtis herbarium and has also found specimens of this 
same collection of Coulter’s in the Gray herbarium on Bigeloma 
veneta ; specimens of T. Davids onii have also been received from 
Parish, who sent this to Hoi way and from Davidson, who originally 
collected it. The collections of Coulter and Davidson are the same 
thing on the same host. There is no good reason for considering 
this species the type of a new genus. Its germination is not yet 
known. Literature: 29, 47, 48, 72. 
Thecaphora Trailii Cke. 
Thecaphora Trailii Cke., Grev., 11 : 155. 1883. 
Thecaphora Cirsii Bond., Bull. Soc. Myc. Fr., 3 :149. 1887. 
Schizonella subtrifida Ell. & Ev,, 1 N. A. Fungi, 226G. 1889. 
Poikilosporium Trailii Vesterg., Micr. liar. Sel., 452. 1902. 
Exsiccati: Schizonella subtrifida Ell. & Ev., on Cirsium ochrocentrum, 
Ell. & Ev., N. A. Fungi, 22G6. 
Sori apparently rather indefinite in the flower heads causing 
more or less abortion and distortion, at maturity shedding out 
reddish or purplish brown dusty spore mass ; spore balls chiefly 
subspherical, composed of 2-4 or rarely 5 or 6 spores, very often 
separating at maturity, about 20-30 g in diameter; spores reddish 
brown, usually hemispherical or three sided or occasionally even 
more irregular, contiguous sides fiat and smooth, free surface 
rounded and provided with more or less evident reticulations that 
show at circumference as rather prominent verruculations, chiefly 
12-18 p. in length. 
Host: Cnicus oclirocentrus, Colo, (type 8. subtrifida). 
This species is near Thecaphora pilulaeformis from which it 
differs in the character of the sori and in the somewhat larger spores 
which are also darker colored and provided with more prominent 
markings. There seems to be no good reason for considering the 
American specimens distinct from the European. Apparently the 
species has never been germinated. 
1 The first description was published in Journ. Myc., 6 : 119. 1891. 
