Autetiuromyces. 127 



Uromyces betae. (Ters. ) 



yEcidiospores — On yellowish rounded or elongated spots. Pseudo- 

 peridia irregularly scattered or circinate, cup-shaped, with 

 whitish torn edges. Spores polygonal, isodiametric, orange- 

 yellow, smooth, 15-25/X in diameter. 



Uredospores — Sori brown, irregularly roundish, surrounded by the 

 ruptured epidermis, scattered or circinate. Spores ovate or 

 elliptical, pale yellowish brown, echinulate, 25-30 x 16-25/x. 



Teleutospores — Sori black brown. Spores roundish, elliptical, 

 ovate or obovate, dark brown, smooth, with a colourless 

 papilla on their summits, 25-35 ^ 20-25/x,. Pedicels long, 

 deciduous. 



Synonyms. 



Uromyces beUc (Pers.). Winter in Rabh., " Krypt. Flor.,' 

 vol. i. p. 155. 



Urcdo bel(E, Pers., "Syn.," p. 220. Berk., " Eng. Flor.,"' 

 vol. V. p. 377. 



Uromyces betce, Kuhn. Cooke, "Grevillea," vol. vii. p. 136; 

 "Micro. Fungi," 4th edit., p. 213. 



Trichobasis betcc, Lev. Cooke, " Hdbk.," No. T5S7 ; "Micro. 

 Fungi," 4th edit., p. 225. 



Exsiccatt. 



Cooke, i. 70; ii. 31, " L. F.," 39. Vize, "Micro. Fungi 

 Bfit.," 553. 



On Befa vulgaris and maritima. 



^cidiospores, April and May; uredospores, June and July; 

 teleutospores, August to October. 



Biology. — The cecidiospores are very rarely found in this country 

 in a state of nature. In 1885, I produced the secidia on two plants of 

 mangold from the teleutospores from wild plants of Beta viariiinia 

 grown on the banks of the River Ouse at West Lynn. Some dead 

 stems of the Beta were laid on the mangold plants on March 20, and 

 on April 21 the secidiospores were found, which in due course were 

 followed by the uredospores. The a^cidium was found in April, on 

 the wild Beta /naritiina. 



