Fig. 142. Subclass Teliosporeae, Order Ustilaginales, Family Tilletiaceae. (A, B) 



Tilletia caries (DC.) Tul. (A) Teliospore with sporidia united in H form. (B) The 



conjugated sporidia have produced a dicaryon conidium. (C) Doassansia sagittariae 



(West.) Fisch., with some of the teliospores germinating. (D) Section through a portion 



of a spore ball of Doassnnsiopsis martianoffiana (Thiim.) Diet. (E, F) Tuburcinia 



trientalis (B. & Br.) Wor. (E) Section of portion of infected leaf with external conidia. 



(F) Germinating spore ball. (G) Germinating spore ball of Urocystis violae (Sow.) 



Fisch. de Waldh. (A-B, after Plowright: A Monograph of British Uredineae and 



Ustilagineae, London, Kegan, Paul, Trench, & Co. C, G, after Brefeld: Untersuchungen 



Gesammtgebiete der Mykologie, Heft 12, pp. 99-236; D, after Diotel, in Engler und 



Prantl: Die Natlirlichen Pflanzenfamihen, Zweite Auflage, vol. 6, pp. 1-98, Leipzig, 



W. Engelmann. E-F, after Woronin: Abhandl. Senckenberg. Natur. GeselL, 12:559- 



591.) 



420 



