DENDRODOOHIUM — TUBERCULINA. 467 



TUBERCULINA. Sacc. (fig 7, p. 442.) 



Sporodochium minute, j)lano-convex, often more or less 

 violet, at length becoming hard and sclerotiform ; conidia 

 snbglobose, acrogenous, conidiophores rather thick, simple, 

 or with a few short branchlets. 



Tuherculina, Sacc, Mich., vol. ii. p. 34 ; Sacc, Syll., iv. p. 

 653 ; Mass., Brit. Fung., vol. i. p. 203. 



The species are remarkable for being parasitic on the mem- 

 bers of another family of fungi, the Uredines. The general 

 habit is that of a Tuhercidaria, near to which form-genus it is 

 placed by Saccardo. Gobi, on the other hand, considers the 

 genus as having more affinity with the Ustilagineae. 



Tuberculina persicina. Sacc. (fig. 7, p. 442.) 

 Sporodochium plano-convex, minute, several often arranged 

 concentrically, violet-brown, paler inside; conidia subglo- 

 bose, 7-8 rarely 10 /x diameter, rosy-violet, smooth; conidio- 

 phores simple, or with a few scattered branches, aseptate, 

 denticulate at the tips, almost colourless. 



Tuberculina persicina, Sacc, Fung. Ital., t. 964 ; Sacc, Syll., 

 iv. n. 3088 ; Plow., Brit. Ured. and Ustilag., p. 299 (excl. 

 syn. Tuberculina vinosa, Sacc) ; Mass. Brit. Fung., vol. i. ]3. 

 204, fig. 132. 



Tubercularia persicina, Ditm. in Sturm's Fl. Deutschl., 



t. 49. 



Parasitic on JJredo, Aecidium, and Boestelia stages of 

 various Uredines. 



Tuberculina vinosa. Sacc. 



Closely allied to Tuberculina persicina, from which it differs 

 in the larger pustules of a vinous colour ; conidia subglobose 

 or ovoid, 11-12 X 10 /x, conidiophores shorter, thicker, sep- 

 tate, simple. 



Tuberculina vinosa, Sacc, Michelia, i. p. 262, and ii. p. 34; 

 Sacc, Syll., iv. n. 3089 ; Massee, Brit. Fung., vol. i. 

 p. 204. 



Parasitic on Aecidium on Coltsfoot, on Boestelia on apple 

 and hawthorn, and on Aecidium on boraginaceous plants. 



Eare. 



2 H 2 



