292 USTILAtilNEAE. 



Ust. panici-frumentacei Wrvf} is ibmul on Panicuvc ffumc/t- 

 t an ton, a cultivated Himalayan millet. Only isolated grains 

 in an ear are attacked, becoming enlarged to twice their 

 normal si/e. Germination of spores takes place sparingly in 

 water, l)ut 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 Korn. completely destroys the ovaries of Sctaria 

 ifidini, S. cii'idin, and S. amhigua, leaving only the outer wall 

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

 smooth-walled, and 6-9 /a broad, 10-12/x long. The proniycelia 

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

 solutions grow out into long threads without producing conidia. 



Ust. neglecta Niessl fills with its black spore-powder the 

 ovaries of Sdaria glauca, S. verticillata, and >S'. viridis. The 

 cells of the promycelium develop into a mycelium without pro- 

 duction of conidia. 



Ust. Koiaczekii Kuhii. On Setaria geniadata in Berlin Botanic Garden. 



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

 appears in tlowers of species of Browns, so that the ovaries 

 become filled 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 

 proniycelia, bearing conidia from wiiich are produced further 

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



Ust, ischaemi Fuck, attacks Androjjogon Ischaemum. The 

 infiorescences 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 witliout 

 coalescing. 



Ust. andropogonis-tuberculati Bi'ef. on Andropogon tidjcrcidatum from 

 Simla. 



Ust. andropogonis-annulati Bref. on Androjjngon annulatvra from Culcutta. 



' Brefel.l, Sclu„nne/pi/:j\ Heft Xii., 189,-). 



