516 



C^OMACEI. 



There is no external evidence in the capsule of the presence of this smut, 

 and it is only by breaking it open that the Tkecaphora can be seen. Itraiseg 

 the testa of the green seed like a dark-coloured blister. The affected seeds 

 shrivel, and do not become of the normal black colour. {t'vj- 207-) 



Gen. 173. 



TUBURCZNIA, Fr. 



Plant deeply seated ; 

 cellular, siibglobose, or 

 Berk. Outl. p. 335. 



spores multi- 

 conch iform. — 

 {Fig. 208.) 



Fig. 208. 



1536. 



Tuburcinia scabies. B. " Potato Scab." 



Spores globose, composed of minute cells, forming together a 

 hollow globe, with one or more lacuna?, generally attached late- 

 rally by a slender thread, olive. — B. 4' Br. Ann. N.H. no. 489. 

 Berk. Ilort. Journ. i. t. 4, /. 30-31. Cooke M.F. t. 3,/. 54. Rahh. 

 exs.no. 900. 



On potatoes. 



The spores of this species are very curious ; they are composed of minute 

 cells, forming together a hollow globe, with one or more lacunae communi- 

 cating with the external air. A hollow shell with one or two apertures will 

 give a notion of their form. They are generally attached laterally by a deli- 

 cate thread. — B. cL Br. (Fig. 208 spores.) 



1537. Tubercinia tzientalis. B. 8^ Br. " Trientalis Smut." 



Sori two lines broad, bullate, containing a black mass of 

 rather irregular depressed subglobose spores, which are very 

 opaque and distinctly cellular, Hyphasma white, branched, 

 creeping, delicate. — B. ^ Br. Ann. N.H. no. 488. Cooke M.F. t. 

 3,/. 52-53. 



On leaves of Trientalis Europcea. 



Gen. 174. 



UROCYSTIS. 



t3 



Fig. 209. 



Spores irregular, consisting 

 of several cells. — Polycystis. 

 Lev. {Fig. 209.) 



This genus is very closely allied to 

 Thecaplwra. 



