Hcniipiiccinia. 189 



pulverulent. In the absence of biological iafoinuuion, I have followed 

 Schroter in uniting these species. 



Puccinia tanaceti. (L). C.) 



Uredospores — Sori pale brown, small, round or oval, pulverulent, 

 elongated. Spores round or ovate, pale brown, with three 

 germ-pores, echinulate, 20-35 ^ i5~2o/a. 



Teleutospores — Sori compact, pulvinate, black. Spores elliptical 

 or clavate, base attenuated, summit thickened (5-7/u.), 

 hooded, smooth, or slightly verrucose towards the summit, 

 deep brown, 40-50 x 20-28/^. Pedicels long, permanent. 



Synonyms. 



Puccinia tanaceti, D. C. Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 209, in part. 



Urcdo tanaceti. D. C, "Encyc," vol. viii. p. 224. 



Trichobasis artemisice, Berk. Cooke, " Micro. Fungi," 4ih 

 edit., p. 223. 



Uredo artemisice. Berk., "Outl.," p. 332. 



Puccinia tanaceti, D. C. Cooke, " Micro. Fungi," 4th edit., 

 p. 207. 



Puccinia discoidearwn, Link. Cooke, " Micro. Fungi," 4th 

 edit., p. 206; " Hdbk.," p. 499. 



Exsiccati. 

 Berk. Cooke, i. 115, 35, 437 ; ii. 126. 



On Artemisia absinthium^ maritima, Tanacetum vulgare. 



Puccinia iridis. (D. C.) 



Uredospores — Sori hypophyllous or amphigenous, reddish brown, 

 scattered irregularly, elongated or roundish, long covered by 

 the epidermis, then pulverulent. Spores elliptical or ovate, 

 with three germ-pores, brown, echinulate, 20-35 ^ 16-26/*. 



Teleutospores — Sori black, linear, soon naked, compact, persistent. 

 Spores oblong, apex very much thickened (io-12/x), rounded 

 or obliquely conical, seldom truncate, base wedge-shaped, 

 constriction slight, smooth, brown, 35-45 x 15-22/A. Pedicels 

 rather long, often brown, persistent. 



