156 British UredinecB and Ustilaginccc. 



Puccinia pimpinellce, Link. Cooke, " Micro. Fungi," 4th edit., 

 p. 209. 



Exsiccaii. 



Vize, "Micro. Fungi Brit.," 124, 425. 



On Pimpinella saxifraga, Heradeuni sphondyliuni, Anthriscus 

 sylvestris, Myrrhis odorata. 

 May to October. 



Puccinia apii. (Wallr.) 



^cidiospores — Spots rounded or irregular, yellow above, paler 

 belo\Y, causing elongated yellow swellings on the stems. 

 Pseudoperidia subcylindrical, with torn, white, everted edges. 

 Spores subglobose, orange-yellow, finely echinulate, about 25/x 

 in diameter. 



Uredospons — Sori rather large, cinnamon-brown, pulverulent, 

 round or elongate, scattered, sometimes circinating. Spores 

 globose, oval, or subpyriform, pale brown, finely verrucose, 

 30-40 X 20-30/^. 



Teleiitospores — Sori rounded, elongated, or irregular, long covered 

 by the epidermis, blackish brown. Spores oval or clavate, 

 smooth, dark brown, scarcely constricted, apex not thickened, 

 30-50 X 15-20/^. Pedicels hyaline, rather persistent, not very 

 short. 



Synonyms. 



Uredo apii. Wallr., " Flor. Crypt. Germ.," vol. ii. p. 203. 

 Puccinia apii. Corda, " Icones," vol. vi. p. 30, fig. n. 

 Cooke, " Hdbk.," p. 502 ; " Micro. Fungi," 4th edit, p. 208. 



Exsiccati. 

 Cooke, i. 40A. Vize, "Fungi Brit.," 54, 127 ; "Micro. Fungi 

 Brit," 554. 



On Apimn graj'eolens. 

 May to September. 



Biology. — The secidiospores occur at the latter part of May, and 

 are by no means profuse, although the yellow spots on which they 

 occur are very conspicuous. On May 27, 1888, I applied the Eecidio- 

 spores and uredospores freely to a plant of Pimpinella saxifraga in my 



