420 UREDINEAE. 



Uredo-Forms of uncertain relationship. 



Uredo agrimoniae (J). ('.). On species of Agrimonia (Britain and U.S. 

 Anierioa). Dietel regards it as related to Melampsora (Theeospora) affri- 

 monide. 



U. Muelleri Scliroet. On Hitbus frnticosus (Britain). 



U. symphyti D. C On Symphytum officinale (Britain). 



U. phillyreae Cooke. On PhiUyrea media (Britain). 



U. macrosora Dc Toni. On Epilohium tetragonum (U.S. America). 



U. vitis Thiini. This species first attracted notice as a disease- 

 ])roducing fungus in Jamaica in 1879, but it had been found previously 

 in the United States. It causes spots on the upper surface of leaves.^ 



U. fici Cact. On Ficus Carica in Italy and U.S. America. 



U. quercus (Brond.). On species of Quercus (Britain and T^.S. Amei'ica). 



U. iridis. On many species of Iris (Britain). 



U. glumarum Rob. On Zea Mais in Belgium and England. 



U. sorghi Fuck. On Sorghum halepense in Greece ; (compare with 

 Uromyces and Fuccinia on the same host.) 



U. g-QSsypii Lager.- This has been observed in South America causing 

 a rust on cotton-jjlants and injuring the yield of cotton. It appears as 

 small purple-brown spots ; the spores are oval and yellow. 



Uredinopsis.' 



[This is a new genus found by Magnus to contain several 

 Uredineae parasitic on Ferns.* The aecidial stage is unknown. 

 The uredospores are abjointed singly from the ends of sporo- 

 genous hyphae ; they are unicellular and without germ-pores. 

 The uredospore-sori are enclosed in a pseudoperidium of elon- 

 gated tubular cells. Unicellular teleutospores (?) are given 

 off from sori similarly to the uredospores. Pluricellular teleuto- 

 spores are developed from the mycelium in the intercellular spaces 

 of the host-plant, never from crust-like sori. On germination 

 four-celled promycelia with spherical sporidia are produced. 



Uredinopsis fjlicina (Niessl.) Magn. On lower surface of fronds of 

 Phegopteris {Polypodium) vulgaris, causing death. 



Ur. struthiopteridis Stoermer. On sterile fronds of Strnthiopteris 

 germanica. 



Ur. pteridis Diet, et Holw. On Pteris aquilina.'] (Etlit.) 



^ Ma.ssce {(IrtvUlta xxi., p. 119) states this species to be identical with U. 

 Vialae of Lagerheiin (Revue gen. de Bolanique, 1890). 



- Lagerheim, Journal of Mycology, vii. p. ' 48. 



•'Dietel, ''Uredo polypodii (Pers.)" Oesterreich. ho/an. Zeitschrift, 1894; also 

 " Der Gattung Uredinopsis," Ber. d. deutsch. botan. Ges., 1895, p. 326. 



■* These host-plants do not come strictly within the scope of tliis \\ork, but 

 a short note on the genus is necessary. (Edit.) 



