292 USTILAGINEAE. 



Ust. panici-frumentacei Bref.^ is found on Panicum frumen- 

 taceum, a cultivated Himalayan millet. Only isolated grains 

 in an ear are attacked, becoming enlarged to twice their 

 normal size. Germination of spores takes place sparingly in 

 water, but abundantly in nutritive solutions. Two-celled promy- 

 celia are produced bearing numerous sprouting conidia. On 

 exhaustion of nutrition, the conidia give off one or two filaments 

 on the surface of the liquid, and from these other sprouting 

 conidia arise. 



Ust. Crameri Kom. completely destroys the ovaries of Setaria 

 italica, S. viridis, and S. amhigua, leaving only the outer wall 

 as an enclosure for the spore-powder. The spores are brown, 

 smooth-walled, and 6-9 m broad, 10-12/u long. The promycelia 

 consist of four or five cells, which in water as well as nutritive 

 solutions grow out into long threads without producing conidia. 



Ust. neiflecta Niessl fiUs with its black spore-powder the 

 ovaries of Setaria glauca, S. verticillata, and S. viridis. The 

 cells of the promycelium develop into a mycelium without pro- 

 duction of conidia. 



Ust. Kolaczekii Kuhii. On Setaria geniculata in Berlin Botanic Grardeu. 



Ust. bromivora Fisch. (Britain and U.S. America). This 

 appears in flowers of species of Bromus, so that the ovaries 

 become fiUed with a dark-brown or black spore-powder, but 

 the glumes or heads undergo no deformation. The spores are 

 smooth, and on germination in water produce only a spindle- 

 shaped one-celled (rarely two-celled) promycelium ; in nutritive 

 solutions, Brefeld found they generally produced two-celled 

 promycelia, bearing conidia from which are produced further 

 promycelia with conidia ; yeast-like colonies are never formed. 



Ust. ischaemi Fuck, attacks Andropogon Ischaemum. The 

 inflorescences remain almost completely enclosed in the upper- 

 most leaf-sheath, and are destroyed except their axes. The 

 spores are brown and smooth-walled. Brefeld states that in- 

 nutritive solutions they produce conidia which remain adherent 

 to the promycelium and grow out into long hyphae without 

 coalescing. 



Ust. andropogonis-tuberculati Bref. on Andropogon tuberculatum from 

 Simla. 



Ust. andropogonis-annulati Bref. on Aiidropngon annulatum from Culcutta. 



'Brefeld, Schimmelpihe, Heft Xii., 1895. 



