81 



VAlilEGATBII GALLS OF CFNiPS KOLLAIil HAiiTIG. 



BY 



Je>JNY KKI.JXYAAN — W. DOf'TEES YAN LeET WEX. 



AcrdciilKiiit — Utivelit. 



Some years a^o we fonnd in tlic Voiulelpark of Amsterdam, some 

 oaks of the xarii'ty Quercus pedunculata argenteo - variegata. Tlie 

 lea\'es were in tlic early summer dec]) l)liie-iiret'ii w itli some i>ale- 

 eoloured points, as a demonstration of its spotted eliaracter. 



The summerbranclies were on the eontrary more white than 

 .liieen and tlie tree showed a very tine aspect witli its (hirk - green 

 crown overtlown witli an abundance of white or somewhat yellow 

 coloured summcrlcaves. 



The leaves liad but some jireen spots and were of an esi)ecially 

 light-yellow colour. 



We have obser\-ed tliese (»aks during scune years and every year 

 we saw the same. But as tlu' cerris-oak is v<*ry 

 common in tlie ])ark, it will be easily understanding- 

 after tin* reseaicJH's of 1ÌEYBUINCK (1), that rlic 

 Kollari-gall was \ery abumhint and some years to 

 be found on almost every Quercus robur of the park. 



.Viso on tlie white-sjtotted oaks we found es])e- 

 cially in tlie year I'.io;! a great lid ml )ei- of galls, and 

 they were ab'ea<l>- good to be seen, before the sum- 

 merl)ranche.s made their ai)pearance. 



The galls were of a very line-yellow colour with 

 green lines , which flowed over the surface diver- 

 gating from the gall-base (see ligure). If we see to the growth of this 

 gall , we tind out of the beautiful researches of Beyeri:>^CK (2) that 



NEW YORK 

 BOTANiCAf 



(1) M. \V. .BJ5YK1UXK — Ucbev (lie .Sexuelle Geiievjitidii voii C'ynips Koll.-ui 

 Marcellia, vol. I, liisc. 1-2, p. 18-20, li)()2. 



(2) Idkm — l>('()l)achtuu<;eu iihev die ersten EiUav. ])linseu eiiiio-er Cyiii])id< 

 •fallen, p. 132, Aiiisterdaiii, 18S2. 



CD 



