C^OMACEI. 



511 



Order XVI. CJEOMACEI. 



Parasitic on living plants ; peridium absent ; spores of one or 

 two orders, simple. 



C^OMACET. 



Spores of one order- 

 Simple and free. 

 Without appendages. 



Springing from delicate threads 

 Produced in separate cells. 



Deeply seated, pulverulent 



Generally nearly black 

 Superficial . 

 Yellow or brown 

 Not inclosed in separate cells 

 With peduncles. 



Deciduous , 

 Permanent . 

 Compound. 

 Irregular 



Subglobose or shell -shaped 

 Spores of two orders — 



1. Sphasrical 



2. Cylindrical, septate . 



1. Sphserical 



2. Wedge-shaped, compact 



1. Concatenate, exposed 



2. Sphserical, myceloid 



Tilletia. 

 [■ UstUago. 



} 



] 



JJreclo. 

 Lecythea, 



Trichobasis. 

 Uromyces. 



Urocysfis. 

 Tuburci'/iia, 



ColeospoHum. 

 Melampsora. 



Cystopv.s. 



Fig. 205. 



Gen. 170. TILLETIA, Tul. 



Spores spliEerical, reticulated, proceed- 

 ing from delicate branched threads. — Berh. 

 Outl.p. 335. Tul. Ann. Sc. Nat. 1847. 



{^Fig. 205.) 



Tilletia caries. Tul. " Bunt." 



Included within the germen ; spores spherical, rather large, 

 black, reticulated. — Tul. Ann. Sc. Nat. 1847, vii. t. 5, /. 1-16. 

 Cooke M.F. p. 202, t. v. /. 84-91. Berk. Eort. Journ, ii. p. 113. 

 Cooke Qiiek. Journ. i.^^. 167. Cooke exs. no. 53. Tul. Ann. Sc.Nat. 

 4:th. ser. ii. 1. 12, f. 1-26. Uredofceticla. Bauer Ann. Sc. Nat. 1824, 

 ii. t. l,f. 17-20. Uredo caries, Eng. Fl. v. p. 375. Ditm. t. 34. 

 Berk, exs.no. lid. 



1519. 



