SCLEROTINIA. 265 



i /'<:/'-.'' Kn'iji'iinininnii Ticliom.) 1 as related to, or identical with 

 ,sv/. sderotiorum. 1'x-hrens, however. is inclined to ascribe it 

 to &!. Fui-L;-H,i,i,i. which has occasionally a //-//_/// /'.s-.xta-c. This 

 hemp disea-e \\-. { > also been found in Alsace. - 



Humphrey regards this species as the cause of a di-ea-e 

 of indoor cucumber.s ; he ascribes a 7/"/V////N-sta:_ r e to it. 



,sV/. sderotiorum is hest known by the conical funnel-shaped 

 depression in the hymenial disc, not present in other species. 



Sclerotinia trifoliorum Kriks 4 (I'.s. America).' Clover 

 is not attacked l>y the >VA /<//////" last considered, hut falls an 

 easy prey to this species, which a^ain derives hut scanty nourish- 

 ment from such food as fre.-h carrot-. >'</. trifol'n, rum is 

 observed wild only on species of clover, and is there fairly 

 common ; many other plants, however, have been artificially 

 infected by it. Host-plants are attacked through their green 

 foliage, which very soon becomes brown and shrivels up. If 

 the atmosphere be -utliciently nioi>t, the mycelium emerges 

 on the exterior and .-preads to nei^hbouriu-' "man- or plan!-. 

 Sclerotia are noi often formed superficially as with >v/. 

 sderotiorum, because the mycelium lives principally inside 

 the plant tis.-uc-. Tin's mycelium resembles that of >'</. 

 sderotiorum in its peculiar property, that sucee>-ful infection 

 oid\- follows if the fungus has lived for a time saprophy tically ; 

 on this account direct infection by spores is harmle. In the 

 secretlOD of an en/yme and of oxalic acid, and in the maiinei 

 in which it destroys tin- tissue- of its host -plant, this specie- 

 behave-, like >''/. W, /W/'n/-///// ju>t de-eribeil. I; is distinguished 



by it- lar-er ascospores, and the absence of a central funnel- 

 shaped depression in the hymenium. Spores germinated in water 



j.roduce numerous boilje- (-o-ealleil -permat ia \\hieh di-t in-ui-h 

 the species from >V/. }'n,-l, ,!',,< nn \\heie (his iloes not take pi 

 l.'"-irup t; found in I>enmark that .!/.//>////,. /n/m// ,i -utfeivd 



1 'I'icliDinirutl', Hull. . it. "' W ....... '. I s - 



Behren "Ueber 'Li- Antn-i-ti-n !. Hant'kn-li--- nn I 



I'ttii,: ill. / 'in/./i- it, a, ivu, p. -_'ns ; " Trockene u. M.I-.-I- l-'.mli- 1. 'l',il>.iU>," /-/./, 

 1893, |. M'. 



I I in|.lio \ . . I - ',' I >> '.'_'. |i|. _'!_' 2 



1 Ktihn, " Die Sklerotienkrankheiten (1. Kl>. .' ///"/. tsT". 

 ll'lnii.. /.'///'////(//( /-/ .</<. einen (I. A 



Mi . /;, // /-'IIH'/H- il'ii a . i \ . , I vi.'i "Then ia no evidence of thi 

 li.i\ HILT " in i-i-i| in Hi it.iin." 

 ' !:-' i up. '/'/ 11 /. !///. /... 



