r.M. 401 



A sharplv delined roundish scar of ;i liuht-vellow colour 



JT * v 



remains after the spores are cast. Thi- i- compo-ed of a 

 -uperlicial layer of coloured pseudoparencliyina, with an under- 

 lying scar-tissue of chaiacteri-tic constitution. The latter con- 

 sists of -.-\elal laVel- of cork-, ells e\tendinu IVolll one ed'_;e ot 



the scar to the other, -epaiatinu the cushion from the twi-- 

 ti--ues. Thi- scar-tissue is not broken through next year, hut 

 the ne\v sporo-eiious cushions break out through other part- 

 of the hark (Fig. 236 . 



G. confusum I'louri-ht. 1 ( I'.ritain.) This is found on 

 J a a if a ni.*; !<nhiii,i almiL; \\ith '/. sabinae, IVoin which it i> 

 ditlicult to di-i in-iii-h. I'vciiidia and aeridia are produecd 

 generally on (',-iifnt //!/.< n.,-t/in-n/i//tit and Cifi/nnin rn/i/n, /'.<, raiel\ 

 on I'l/rii* communis. The aecidia on (',-<iftt,;/i/x resemhle tho-c 

 of (,'. i-liii-iifim forim on the same host, and dehi-re, by the 



*/ > 



ruptured apex of the peridium. Those produced on 7'///'//x 

 communis are distinguished- from arcidia of >;. sdbinat on 



ill'- -aim' host by dehi-ciii<_i through the open apex of the 



peridium. 



[nfections of ^/ /////. ri.,,/'//^^/// t'rom .///// /y^/'//.s n////////'///.s L. r a\~e 



the follo\\ in- i c-ult- : 



( in Hn-t-|>l;uit. Autlmiitv . 



, , , , I I A riiiilia and a-i-iili;i u it li I ., ., , 



(suaonia vulaaris. - '' , , , K- bischei 



I tubular pendia, - | 



Crataegus Oxyacantha, 



/V/-//.V communis, 



Crataegut Oxyacantha, ., .. ,, V\\\ ii-lii 



The following American species of Gymnosporangiiim have 



I ibed : :; 



i >n Aihon itae or white cedar : 



G. biseptatum Klli-. < h, i\\i-- and needle- of Chamaecypar 

 tlii/n'nli< and L iiiin-i i/,-// s decurrens. The aecidia on f '/<//.////-. 

 tain, ,iti,i and Amelanchicr canadensis. 



Howri bt, Linnean 8oc. ./<.//// i /;..'(, ( //i, I^^T. I 1 '.. l-'ili--i. Ztitschrij 

 /'i/i. ,,/.-,-ti,,/.ln ;> ,i, i.. IS'.M ; \\uli Bummarj <! literature. l\l<'l.,ilni. / 



,,(//)/, ,/ . , Z( '" '/'', II., 1 *!!.'!. 



K. ri-'-ii- 1 I-- 



: Farl'iw. '/'A- / r,/, ,/,!,! at nl' III- <i'ifntii*/>' I-IIII-IIH >'l' ih' I i s Ixsii. 



.-UK I oilni papei In. LI in \.,M.,I; papei ' irangia, l^^i, t,, 



iv.u. ll.l-i... (Repori Vegttabli l'"ih< ,/,,.////.., l^v I - l'.|.i. ,.i \ 



rultiio-i givet a ,'-n,ii', \\itli I|I-M-I l|il loll ni'l liju I ''. '" .iii-l 



to .itiip-nt tM- cioliai.i M I cher, ZeiUchrtfl /. /''' i . i^'.'i 



2< 



