UKKDINKAE. 333 



The european 1'ivdineae comprise the following families and 

 genera: Pucdnieae (Uromyces and Pucdnid); Phra^mid: 

 (Triphragmium and /'///>/_</////,//////,): Melamp.-oreae i .l/.A//////.*-,-//, 

 Melampsoretta, Calyptospora, <'>!, ox/iorium, Chrysomyxa, &&& Cron- 

 ii rt In in ) ; ( rymnosporangieae < Gymnosporangium ) : Kndophvlleae 

 li /////////>; also tli.- genus Uredinopsis on 



Uromyces. 



Teleutospores unicellular and produced in flattened sori. 

 Only one teleutospore is abjointcd from cadi spun. pin ax-. 

 Telcutospores with a .-hi'dc -i-nu-poiv. I redosporcs, aecidia, 

 and pycnidia arc not present in every species. 



(1) All fin-nix f xyi/./v ///--.so// ,<// //// same //<>,/-/>/>/,// ; 



Uromyces ervi (\Vallr.) ( I'.ritain >.' X't-tdi-rnst. The ai-i-idia 

 aiv produced mi \'i>-ii< h'lrxiitn \\\ May and tliriniuhmu the 

 summer. Si-aUm-d aninn-<t the at-cidia an.- the suri iVnm 

 which urednsjM.ivs arc .sparingly -ivm oil' in early sunmu-r: 

 the teleiitnspores are given i'If al lUiidantlv 1'roiu the same 

 sori from .Inly onwards. The aecidiospores -erniinate mi the 

 veteh plants, and jimducc therein a mycelium from which the 

 aecidia and teleutospores arise. Infect ion liy means of >poridia, 

 derived from the teleutospore-. n-ults in the production of a 

 mycelium which hear- aecidia only. r\cnidia < -pel mo-onia ) 

 aiv ah-ent in this species and al-o in I', fdbae, 



U. fabae (Pere.), [ Z7. orofei (Pers.)] (Britain and I'.s. America). 



This occurs on species of Vida and Lutlii/ru*. Sori are formed 

 ahundantly and ^i\'e off ln.th aredospores and ieleutn>jMiiv- 



the latter heilii; BmOOth-COated. No j.yciiidia liave aa yet 1'ceii 



observed. 



U. trifolii (lledwj. ( 'lo\cr-rust. Paia-iiie on various sp, 

 of clover. I 'redo- and |eleiiiosjM>re> aie -enerally produced; 

 aeeidi;i have lieeii found only on Trifolimn r<-j //s ( .( lei many and 

 P.ritaiiil. '/'. i m-n rntn in (ltal\), 7'. />r<t/- / d'eiimark. P.ritain, 

 and America). (in '/'///;./////// repens hoih leleiitospore and 

 aeeidinni generations cause -sv'lliu;4 and distortion (1 f leaf-rih> 

 and petiole-, the deformation hein- mo>i marked where the 

 mycelium has hihernati-d and ]iioduc.-d ie|eiilos|M.re> in -prniu. 



'Tin- ' lll-'t UllluM! 1 ed !"l tllf no-mi i-lli'i- i't' till- 1 'l rililn-.li- ill 1'ilit.HII 



uiiil N'mili Ann-Hi -.1 are I'luwn-jlit Brit ink I 1889 nnl l - '.uli>\4 .m.l 



- \iM-.iir i //.. Index for f7.S, .1 i 391 l-Mit.i 



