SEPTOSPORIUM. 519 



spot on Vitis calif arnica 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. 



Fumago. 



Conidia grey and two- or three-celled. 



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



3. FAM. STILBEAE. 



1. SkR. HVALOSTII.HKAE. 



Sect. Amerusporae. 



Stysanus. 



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

 on a dark cylindrical or clavatc erect stroma. 



Stysanus veronicae I'ass.^ This produces irregular spots on 

 the leaves of cultivated Veronica loncjifolia 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 Spirra Ulmnria in Ireland. 



Isaria. 



Stroma erect, clavate, generally branched and bearing conidio- 

 phores all over. The conidia are abjointed from the a])ex of 

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



Isaria fuciformis l>erk.'* This disease, first observed in 

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

 attacks grasses, especially Fcstwa, during summer. The stems 

 and ears are glued together l)y the fungus-stronia, and conidia 

 are developed on all parts of the plants. 



2. Ser. Phakostilbkae. 

 Sect. PIi ru(fiii osporae. 



Isariopsis. 



Conidia pale-coloured, cylindrical, and pluricellular. 

 Isariopsis griseola Sacc* ])roduces spots on leaves of living 



1 Jhdwi-ila, 1877. p. 12.3. 



-M'Weeney, Iriah Xaturalisi, ISO"), ]•. '1~'^. 



•^ Worth. G. Smith, Diseases of Fi<ld nnd Garden Crops, London, 1x84, p. o.!. 



••Briosi and Cavara, Fiuujhi parasif. 



