* TILLETIA. 311 



less coiiidia incapable of germination. When the nutritive sohition was 

 frequently renewed, the niyoeliiim grew vigorously and forrued a sclerotium- 

 like body, from which the dark spores were laterally abjointed and set 

 free. On this account Brefeld founded a group with the generic name of 

 Ustilaginoidea ; it includes this species as Ustilaginoidea oryzae and an- 

 other similar one on Setaria Crus-Ardeae he calls Ust. setariae. The group 

 has affinities with the Ustilagineae and Ascomycetes like Claviceps, and 

 Brefeld sees in it a connecting link between the two families. 

 Several other American species of Tilletia have been recorded. 



Neovossia. 



Characters similar to TiUdia, except that the couidia produced 

 on g-ermination of the spores do not coalesce. Oonidia sown 

 in nutritive solutions produce a mycelium with two kinds of 

 secondary conidia. 



N. moliniae Kijrnike. The black spore-powder is developed 

 in enlarged ovaries of Molinia coernlea. The smooth ovoid 

 spores are enclosed in a transparent mantle, and have a hyaline 

 tail-like appendage. Each spore is produced at the end of a 

 hyphal filament, which remains attached after the spore-mass is 

 freed and forms the appendage. The spores germinate in water 

 at once, and send up a simple aerial promyeelium, on the apex 

 of which a crown of many needle-like conidia are produced. 

 Septation of the promycelia may take place if they become very 

 long, the protoplasm passing into the apical segments and leaving 

 the basal empty, as in Tilletia. Branching of the promycelia 

 may also occur. The conidia on being shed give off sickle- 

 shaped secondary conidia. In nutritive solutions, however, the 

 conidia produce a mycelium from which either sickle-shaped or 

 needle-shaped conidia may be given off, the latter however never 

 as a crown or circlet. 



N. Barclayana Bref. In the fruits of Pennisetum triflorum in Simla. 

 (Tills is not synonymous with Ustilacjo penniseti'R2ih\\.). 



N. {'.) bambusae Bref. In fruits of Ijamboo from Brazil. 



Entyloma. 



Mycelium intercellular and never gelatinous. The spores 

 are of intercalary origin, and arise here and there on any part 

 of the mycelium. The spore-clusters appear externally as 

 spots, and the spores never leave the host. The spores on 



