SEPTOSPORIUM. 519 



spot on Vitis californica in California. The leaves become 

 quite black on the lower surface, brown on the upper. The 

 fungus has not as yet been reported on cultivated vines. 



Fuma^o. 



Conidia grey and two- or three-celled. 



The species belong to Capnodium (see p. 181). 



3. FAM. STILBEAE. 



1. See. Hyalostilbeae. 

 Sect. Amerosporae. 



Stysanus. 



Conidia pale-coloured, more or less spherical, and developed 

 on a dark cylindrical or clavate erect stroma. 



Stysanus veronicae Pass.^ This produces irregular spots on 

 the leaves of cultivated Veronica longifolia in Italy, and causes 

 the plant to wither. The columnar stromata are produced on 

 the lower surface of the leaves, and give off unicellular conidia. 



St. ulmariae M'W.^ On Spirea Ulmaria in Ireland. 



Isaria. 



Stroma erect, clavate, generally branched and bearing conidio- 

 phores all over. The conidia are abjointed from the apex of 

 the conidiophores, and are unicellular, hyaline, and rounded. 



Isaria fuciformis Berk.^ This disease, first observed in 

 Australia, is described by Smith as occurring in England. It 

 attacks grasses, especially Festuca, during summer. The stems 

 and ears are glued together by the fungus-stroma, and conidia 

 are developed on all parts of the plants. 



2. Ser. Phaeostilbeae. 

 Sect. Phragmospwae. 



Isariopsis. 



Conidia pale-coloured, cylindrical, and pluriceUular. 

 Isariopsis griseola Sacc* produces spots on leaves of living 



^Hedwigia, 1S77, p. 123. 



^M'Weeney, Irish Naturalkt, 1895, p. 273. 



' Worth. G. Smith, Diseases of Field and Garden Crops, London, 1884, p. 55. 



*Briosi and Cavara, Funghi parasii. 



