AtUciipuccinia. 145 



Puccinia thesii. (Desv.) 



.Ecidiospores — Pseudoperidia scattered and thickly crowded over 

 the whole plant, cylindrical, whitish, with torn edges. Spores 

 nearly spherical, orange-yellow, smooth, 17-26 x 12-17/x. 



Uredospores — Sori reddish brown, round, subconfluent. Spores 

 round or shortly elliptical, brown, echinulate, 20-28/x, in 

 diameter. 



Teleutospores — Sori compact, round or elongate, brownish black. 

 Spores elliptical or ovate, central constriction slight or absent, 

 base rounded, apex thickened and darker, smooth, brown, 

 30-40 X 14-28/X. Pedicels brown, persistent, very long. 



Synonyms. 



Puccinia thesii (Desv.). Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 202. 



^cidiiini thesii. \ytsv.,/our. de Bot., vol. ii. p. 311. Cooke, 

 " Hdbk.," p. 537; "Micro. Fungi," 4th edit., p. 195, t. iii. figs. 

 50-51. B. and Br., Ann. Nat. Hist., No, 1048. 



Puccinia thesii, Chail. Cooke, "Hdbk.," p. 495; "Micro. 

 Fungi," 4th edit., p. 204. 



Exsiccati. 



Berk., 318. Cooke, ii. 311. Vize, "Fungi Brit.," 12, 81; 

 "Micro. Fungi Brit.," 214,' 457. 



On Thesiu?n humifusum. 

 April to October. 



Puccinia calthse. Link. 



y^cidiospores — Pseudoperidia on roundish spots, or when cauline 

 on long swellings, flat, with white torn edges. Spores sub- 

 globose, finely verrucose, orange, 20-30/A in diameter. 



Uredospores — Sori small, round, chestnut-brown, soon scattered. 

 Spores globose or elliptical, echinulate, brown, 22-30 x 

 20-25/4. 



Teleutospores — Sori small, black, pulverulent, but persistent. 

 Spores oblong, attenuated towards both extremities, rarely 

 rounded, central constriction little or none, apex conical or 

 with a paler wart-like papilla, smooth, brown, 30-44 X 13-22/x. 

 Pedicels persistent, rather long. 



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