142 British Uredinea"- and Ustilaginec€. 



Oil Scilla bifolia and nutans. 

 May and June. 



Biology. — The presence of the mycelium causes the sori to be 

 produced on paler discoloured spots on the leaves and stems. 



Uromyces ornitliogali. (Wallr.) 



Teleiito spores — Sori dark brown, scattered, elliptical or oblong, on 

 the smaller leaves causing various distortions, often confluent, 

 at first covered by the epidermis, then pulverulent. Spores 

 elliptical or subpyriform, sometimes smooth, sometimes rough, 

 pale or chestnut-brown, having a colourless wart-like point 

 above, rounded or attenuated below, 25-40 X 17-22/x. Pedi- 

 cels long, slender, deciduous. 



Synonyms. 



Uromyces ornithogali (Wallr.). Winter in Rabh., " Krypt. 

 Flor.," vol. i. p. 141. 



Eijsibe rostcUata, var. ornithogali. Wallr., " Flor. Crypt. 

 Germ.," vol. ii. p. 209. 



Uromyces ornithogali, Le'v. Cooke, " Grevillea," vol. vii. 



p. 138. 



On Gagea lutea, L. 



Biology. — The presence of the mycelium causes variously shaped 

 pale spots on the affected leaves. 



Uromyces urticse. Cooke. 



Teleiitospores — Subpyriform, apiculate, pale, 30 X iS/i^. Epispore 

 thickened, on hyaline pedicels. 



Synonym. 

 Uromyces iirticcE. Cooke, "Grevillea," vol. vii. p. 137. 



On Urtica dioica. Shere, Surrey. 



This species has never been found but once. It is remarkable 

 that no one except Dr. Cooke should have met with it, seeing how 

 common the host-plant is. 



