520 FUNGI IMPERFECTI. 



cultivated kidney bean. The mycelium lives in the leaf-tissues 

 and forms stromata under the stomata, from which the conidio- 

 phores arise in tufts. The fungus often occurs along with 

 Uromyces phaseoli. 



Other species of Isariopsis are recorded on the living leaves 

 of various host-plants, e.g. Cerastium and Stellaria. 



4- FAM. TUBERCULARIEAE. 



Volutella. 



The conidial patch or sporodochium is disciform, regular, 

 and fringed, or studded over with elongated spine-like hyphae. 

 Conidiophores simple or branched, and bearing elliptical or 

 oblong conidia. 



The majority of the species of Volutella frequent only dead 

 plant remains. Atkinson,^ however, describes and figures a 

 widespread carnation-disease in North America, which is ascribed 

 to a species as yet unnamed. Fresh cuttings are most commonly 

 attacked, and exhibit dirty brown depressed areas, which soon 

 ruin the cutting for purposes of cultivation. 



Fusarium. 



Sporodochium more or less effused. Conidia spindle-shaped 

 or sickle-like, pluricellular when mature. The conidiophores 

 are branched, and give off the conidia from their apex. 



Fusarium heterosporium Nees. Frank- found a field of 

 rye near Kiel completely destroyed, and the ears quite over- 

 grown by this fungus. I have found it on ears of Lolium 

 perenne and Molinia coervha in Bavaria. 



Species of Fusarium have been frequently described as causing 

 injury to cereal and grass-crops,^ in some cases to a serious 

 extent. 



While most of the species of Fusarium are found only on 

 dead or dying plant-remains, a parasitic mode of life has been 

 ascribed to some. 



Fusarium lycopersici Sacc* The " Sleeping Disease " of 



^"Carnation Diseases'' in Report of American Carnation Society, 1893. 

 -Jahrbuch d. deutsch. landwirth. GeseU., 1892. 

 ■'Worth. G. Smith, Diseases of Crops, 1884, p. 208. 



Rostrup [Ftisarium avetMceum on Oat) Landboskrifter, v., 1893. 

 ■■Massee, Gardener's Chronicle, xvii., 1895, p. 707. (Edit.) 



