CLAVICBPS. 195 



01. nigricans (Tul.) on //^AW/ <///.< and ,sv//-////.s, with s 

 of a dark violet colour (Britain). 



Cl. setuloso (Hiii-l.) <n Poa. Stmniiita >tr,-i\v-\ i-llo\v in colour. 

 Cl. pusilla <Vs. "ii Andropogon Ischaemum. 



(2) SPHAERIACEAE. 



The group of the Sphaeriaceae includes eighteen families, 

 but only the following contain parasites of interest to us. 



Families: Tri<-lni*i>li<i< rin , M< in imi/mn, AiiifihixfilKii i 



Oucurbitarieae, Sphaerelloideae, /'/-/-.sy/^/v//-, Gnomonieae, rn/^m, 

 lii,itri/i>-<\ and AL'/inini/iiJ, !. 



TRICHOSPHAERIEAE 

 (including Coleroa and Herpotrichia). 



Coleroa. 



The perithecia have thin walls witli radiating bristles, and 

 sit superficially on the substratum. The asci have thickened 

 apices, and contain eight two-celled, faintly ci.li.urcd spores. 



Coleroa chaetomium Kun/r, occurs on living leaves ,,t' 

 y,'///,,/s caesius and 7.'. Idaeus, In addition to perithecia, it 

 forms conidia known as J'J>iJ.^>/-i/i,i/ //////' Nees. 



0. alchemillae (Ircv. (Ih-itain and I'.S. America). On lea. 



Of ^l/f/n in / Hi i r it /I/HI- i*. 



0. andromedae IJehm. ^\\ leaves of Aii'//-ino/it //c///;///^. 



C. potentillae Fries ( l',i-itain and I'.S. America). Leaves of 

 /'..////////// anserina. It Ibrms perithecia which are situated 

 on the leaf-ribs: a No conidia ( J/"/-.sn// in ji,,f, //'//,' 



0. subtilis l-'nck. ^\\ leaves of l'<,t, ,/tilln cinerea. 



C. circinans Fries. (h\ leaves of Geranium /w^//<///;//,V/// and 



< ! . mull, . 



C. petasitidis l-'m-k. ' Mi leaves of /',///*//,>, , 



Trichosphaeria. 



I'd'it hecia -mall, spherical or ovoid, and nioiv or less hairy. 



Paraphyses di-iinci. Sporo \\iih one. two, or t..ur cells. 



\\ . '_'i\ ilii> '_'<-iiu- ;i \\ nl.-i .-. "|M- 1 1 1.1 1 1 Winii'i , iii n I include species with 



. in-, two, iii.'l t'"in -i i-lli-il ~|M.|I-^ nf lisiiliiu- i-r liirlit i-iili>in, .in. I \\ 



