ON LEGUMINOS/E 



97 



12. Uromyces Fabae De Bary. 



Uredo Fabae Pers. in Rom. Men. Magazin, i. 93. 



Uromyces Fabae De Bary, Ann. Sci. Nat. sor. 4, xx. 72. Plowr. Ured. 



p. 119. Sacc. Syll. vii. 531 p.p. Sydow, Monogr. ii. 103. 



Fischer, Ured. Schweiz, p. 65, f. 49 — 51. McAlpine, Rusts of 



Australia, p. 93, f. 307. 

 Trichobasis Fabae Cooke, Handb. p. 508 ; Micr. Fung. p. 225. 

 Uromyces appendiculatus Lev. ; Cooke, Micr. Fung. p. 212, pi. vii. 



f. 149—150 p.p. 

 Puccinia Fabae Link, referred by Cooke to this species, has no 



existence in nature (Handb. p. 508; Micr. Fung. p. 211). 



Spermogones. Hypophyllous, growing among the secidia. 



jEcidiospores. iEcidia hypophyllous, seated on pale-yellow 

 spots, solitary or in small round or elongated clusters, shortly 

 cup-shaped, with a whitish, torn, revolute margin ; spores 

 densely and minutely verruculose, yellow, 14 — 22 p. 



Uredospores. Sori amphigenous, scattered or circinate, girt 

 by the ruptured epidermis, minute, pulverulent, pale-brown ; 

 spores globose to ovate, distantly echinulate, at length pale- 

 brown, 20 — 30 x 18 — 26 fx\ epispore 1^ — 2iyu, thick, with three 

 or four germ-pores. 



Teleutospores. Sori similar, but per- 

 sistent and darker or blackish-brown ; 

 spores subglobose to obovate, rounded or 

 truncate and thickened above, where the 

 wall is dark and 7 — 11^ thick, sometimes 

 with a colourless papilla, smooth, brown, 

 25 — 38x18 — 27 /* ; pedicels brownish, 

 persistent, thick and as much as 40 — 70 /x 

 long. 



( )n leaves and stems of Faba vulgaris, 

 Lathyrus pratensis (?), Pisum sativum, 

 Vicia Cracca, V. sativa, V. sepium. iEcidia 

 in April, May; uredospores from May, 

 teleutospores from July onwards, lasting 

 through the winter on the dead stems. 

 (Figs. 49—52.) 



One of the most widely spread of the Uredinales, occurring in every 

 o. u. 7 



Fig. 49. U. Fabae. 



Teleutospores on stem 



of Broad Bean. 



