W. IUtkson 09 



EXPLANATION OF PLATES III AND IV. 



Thi» drAWtntri> li^><» which Uiono nUlvnwrn- prrixirctl wrrr lutuh- by Mr ( . H. 0"l« r»l<»ck, 

 Tho various lonm of fjTt'Oii (lr|HMul on tlie iuhuIm-i (tf Iav«TM whirli air ^•r^l•n or \vhlt« 



Fig. 1. KuomifmMt jiip(uncu* Ititifolius, wliitoHkinncd variety, liaviiij^ n unn-u coir. 

 Fig. 2. IWvorsotl form of tlio kaiuo, having a k>»'<'" ^l^iii over h wliiir con-. 



Fig. S. Ii»»af from Rtiothcr hush of the KRmr having' om- Hid«' wh<»lly ^'rom hikI ilir «itli«r 



i«i(lt> whito skinned. (Slijjhtly too hluo in torn : Fi^'. I roin-ctly ^,'iv«K tin cMlr.m (•( 



Uio dorsal nurfacojt. ) 

 Fign. 4 and *>. Hack and front of a leaf of tlw sjinic liavinp an nrca wliolly i^Mcni ;h>|k ;iii»H! 



next thr luidrib on one si(io. 

 Fig. t». i'i'pntitnui liitucri, var. vuricijtitit ; tlio wliito-skiruM'd fomi. 

 Fig. 7. Tho j«anu' ; j^n^-n skinned form. 



Fip. 8. Ivy leavini iVlarponium sliowint^ tlio mixture of tlio two kiuils of rliimnrra. 

 Fig. 9. Leaf of the same : one side wliite-skinned the other side for tho incmt piirt 



green -skinned. 

 Fig. 10. Madame Solleroi, zonal Pelarj,'onium: the white-skinned form (Tlu- veins in 



this figure are too wide. They are correctly represented in tlie other figures.) 

 Fig. 11. The same with reversed areas at apex of leaf. 

 Fig. 12. The same: green-skinnetl leaf. 



Fig. 13. The same : leaf all white on one side, Rreen-skinned over most of tlio other sidr. 

 Fig. 14. The same: leaf half green and half green-skinned. 

 Fig. 15. Baur's white-skinned zonal : leaf showin^r irregularities in the uninbir of lay«rs 



de6cient in chlorophyll. 

 Fig. 16. Zonal Caroline Schmidt : leaf with two separate areas of reversal. 



Joura. of GtMi. VIII 



