THIK1..U [A. 183 



The fungus has been observed on /,/////', ///> "//////.s/, /I,//'//.-,. A. ////,//.x, 

 A. //"//// /X 7V/'/"//'//" coerulea, o// ///_//?///* ('ri*tu //"///, /'/.v/// 

 sa.tivum, Senedo * A '/"//*, ami Cyclamen} 



Thielaviopsis ethaceticus Went.- has been given as tin- ca 

 of a sugar-cane disease in -lava. 



The Tuberaceae form a third sub-division of the lVii-]>"iia< 

 The group includes the Tubereae and the Elaphomycetex It 

 contains no forms injurious to plants. 



In investigating /:'/"//// "//////vx '/////< ///"/V.s and A', variegatus, 

 Reess 3 found that it not only formed mycorhi/a, but was a 

 parasitic on the roots of Pinus and destroyed them. 



I'VI!I-:X().MV('ETES. 



Tin- ascocarp or perithecium of the ryrenoni\vete> i> a do-,-,! 

 strurture provided with an opening by which tin- ascospores 

 air discharged. The ascocarj) of the IVrisporiaccae. as has 

 aln-ady been jiointed out, has no such opening. The inner wall 

 of the perithecium is clothed with (//) the asd, (/<) delicate fuiiual 

 tilainents. Of the latter, those in the depth of the peril hiM.-iuni 

 are known as paraphyses, and among them the asci originate; 

 others around the sides and opening of the perithecium are 

 the periphyses, which ^row inwards so as to close both p<>i,- 

 and canal. Perithecia may occur isolated or massed to-ethci. 

 and are frequently sunk in a special cushion of fungoid ti--nie. 

 the .-ti'omata. 



Tin- l'yreiio]i;\ crte- may also produce cldamydo-poiev and 

 various forms of pycnoconidia and Tree conidia : tin--,- al-o are 

 frei|Uently devcloj.ed on special stroinata. Accordin- to I'-ivfeld'.- 

 reseai'ches, tin 1 structures 80 \\cll known as ^pci ino-oiiia with 

 theii- contained spcrmatia are only pxcnidia coiitnining conidia. 

 which have in many case-, been artificially caused to iMTiuinate. 



The l'yrenoni\ ceies include a large number of forms par- 

 asitic on all parts of livin- plants, nio-t of them ale capabli- 

 ol' exi-tin- for some part of their li\c- as saprophvtex. and as 



'This tim_'u> i- I|I--I-M)>I-I| ,i~ < tii-iiiL- .1 i ""' rof "I I ill U.S 



. \IIH-I if, i (Connect. Agric. /.'.'/ >. x/<//. l;> /, .//'/)./ isnli. (Milit.i 



\\'"'llt, .1 /'/(/ /' i-nnr i/, Jdi'il Sllil., finil il-lfn . |X' I.".. 



I' I l-'i" ii.. "Untenuch. lib. Km n. Lebensgesohiohte d. II n lit i uil-l." 



/;,!,/,, ,//,,.,, botan. ll'-n 7. l s ^7. \\ nli I;: 



