284 British Uredincce and UstilaginccB. 



Exsiccati. 

 Baxter, 113. Cooke, i. 53. Vize, "Micro. Fungi," 130. 

 On Triticum vulgare. 

 Biology. — See p. 86. 



Tilletia decipiens. (Pers.) 



Spore-masses black, compact, produced within the ovary, fetid. 

 Teleutospores globose, reticulated, ridges 2 •5-3^11 high and 

 about ^ix. apart, dark brown, 24-2 8/x in diameter. 



Synonyms. 



Schrot., loc. cit., p. 278. Winter, loc. at., p. iii. 

 Uredo segetum, var. decipiens. Pers., "Syn.," p. 225. 

 Tilletia sphcerococca, F. v. Waldh. Cooke, " Grevillea," vol. xii. 

 p. 99. 



On Agrostis vulgaris. 



Biology. — Professor J. W. H. Trail states that the presence of 

 the fungus in Agrostis vulgaris causes it to assume the form called 

 pumila, usually regarded as a distinct variety of this grass. 



Tilletia striaeformis. (Westd.) 



Spore-masses black, in parallel lines on the leaves, leaf-sheaths, 

 and stems. Teleutospores globose or irregularly rounded, 

 thickly covered with minute spicules, which towards the base 

 of the spores tend to form reticulations, olive-brown, 10-15 



X 9-1 2/X. 



Syno?}yms. 



Schrot., loc. cit., p. 278. Winter, loc. cit., p. 108. 



Uredo striceformis. Westd., Bull. Acad, de JSrux., 185 1, 

 p. 406. 



Ustilago salveii. B. and Br., Ami. Nat. Hist., No. 482. 



Cooke, "Hdbk.," p. 514; "Micro. Fungi," 4th edit., p. 230, 



t. vi. figs. 1 1 7-1 19. 



Exsiccati. 



Cooke, i. 57. Vize, "Micro. Fungi," 133; "Micro. Fungi 

 Brit.," 222. 



