20 



r w iilfly 

 ;Ih' rnriii;^ 

 ions. Ill 



lie of tilt' 



|lCcilllt'IIS 



■cut ri'Miu 



illicriiiiii. 



into tli(> 



[.('•v.. tlmt 



J'liitiiiii. 



1*1 tii:it on 



)||ins iiic 



hniilcertti, 

 Iniijins oil 

 ro|iii!it('ly 

 lis III host 

 lit'in. tlicv 

 •sts. I'n- 

 rollcctioiis 

 Aincriciiii 



187J. 



p. 324- 



iiliuniliint, 

 idint!' over 

 (1. viiiyiiijH' 



(pcndiiijics 

 ■) times the 



oinctiiiios 

 ics usually 

 irions nnd 



yfowtli ol' 

 t prc'ssui'o. 



aid, Q. f)i- 

 cciiicif \ai". 

 f. (J. iiujra, 



Coiiiiiion on oiiks iicross tlic contiiKMit. A vt-ry \nrinltl(' spccios 

 lis Ih'Ii' rt'coiriii/cil. IT if sccuH'd imssildc it would lie ininli iiioi*' 

 satisliiftoiy to distiiluitc it under seviTai s|ircili(' iianics. some ol' wldcli 

 are already in use. Often tlie litnii on a eertain host sne«'ies is sni- 

 licientlv liistinet when eonsidi'i'i-d i»y ihell" to merit this treiitmeiit. 

 Fore.\ani|ile the type on (Jtiirnis I'lihni known as .1/. rxtciixn. ('. A' 

 I*., is everywhere on this host siiHicieiitly alike to lie easily rccoifiiized : 

 lint. ii|M>ii examiniiiii' s|ieein'.('iis even IVoin the same ioealities on allied 

 <»aks. il soon lieconies imjiossilile to find dividinti' lp(ainds iielween this 

 lorni and others which at lirst si-ilit are very dilVerent. like that called 

 .]f. iihlirti'iiitd. I'eck oil (Jmrciix liiilti'i((lr!n, etc. It must also lie 

 acknowledui'd that it is well niuh ini|iossil»!e to distiiiuuish some |i»riiis 

 rereried to }f. Alni IVoin certain speciniens placed iimler J/, i/iu'rcintt, 

 except liv rereiciice to the host plants. I'sually liowe\er the latter 

 dilVers IVom the rornier liy loiiu'cr, conimoiiiy more nniiier»ais appen- 

 da'i'cs and larL-er sporidia. The perithecia also uvcraji'c lartrer. 



M. i'aiocladoplioi'a, Atkinson, in .Ifairn. Klisha Mitchell Soc. VII, 

 p. i;j. 



A/ii iii>/i/uria i/i'iimuma, (Sclnv.) Jouni. Mycol. I, p. loi. 



Ilypopliyllous. Mycelium thin and dilVuso or in dense, orhicnlar 

 spots. I'erithecia i)lack, at leiiuth de|iress('d in the center, walls 

 tliick, reticiiliitions rather distinct. 100-140 /t: appendages not nil- 

 inerous. about 7-1-. siilthyaline. 1-"J times diameter (tfthe jieritheciiim. 

 2-S times dicliot(»iiiously branched, or the axis contiiiuoiis. Itearinii' 

 two or more sets ol'opptisite branches and the loworiiiost of tliese some- 

 times showinu' the same axial eloni>atioir. tips stroiifrly iiuMirved. Asci 

 4-0. .'Sporidia uranular and nucleate. (!-8. 20-'2r) ft in lenutli. 



On QiH'i-rns (iijutitlra, C^. /(/(//v'/b/Zt/, Florida (Martin), South Car- 

 olina and Alahama (Atkinson). 



This species is especially distinguished l>y the peculiar branching' 

 of some of the appondaii'es lirst descrilied l»y KIlis and Martin (Jour- 

 nal of Mycology I. p. 101), lint referred to M. deiixisHiwa, (.<cliw.) 

 It eaniiot imw lie jiositively ascertained to what Sohweinitz applieil 

 this name. Iml his plant was collected at l^ethlehein, W\., upon oak 

 leaves ,ecies not .uiveii. This is a stroiiji" evidence a<>aiiist his speci- 

 men lieioniiinii' to the present species. In Cooke and Peck's Erysi- 

 ]ihei of the I'nited States (1ST2), 2[. den si ssi ma, {T^Aww) \\i\<^ identi- 

 lied with a specimen <iii QiteiriiH tinctoria in New York. This was 

 j iresiima lily correct liut if so our present species is certainly distinct, 

 as it diiVers conspicuously from the New York sjiecimens. There can 

 however lie no doiilit tliat the description in the Journal of Mycoloiry 

 was drawn from specimens lielonu'inii- to this newly named species. 

 (The speciiiKMi in Kll. X. A. F. 123S is Atkinson's now species.) 



M. erinw»i)liila, Peek, IJnll. Torr. Bot. Club. X, p. 75. 



Mycelium thin. Perithecia 90-100 /^. fragile, dark, opake, retic- 



