XXX VI PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY 



SCIENTIFIC COMMITTEE. 



January 5, 1915. 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, with ten members 

 present and Messrs. Langley Smith and Davis. 



Variegation in Pelargoniums. — Mr. A. Langley Smith showed a 

 series of scented-leaved Pelargoniums with the following note of 

 variegation in them : — 



"1. Variegation is a heritable character in scented- leaved 

 Pelargoniums. 



"2. It appears to behave as a recessive character. 



"3. It is probably due to the absence of a factor in whose presence 

 the leaf is green. 



" 4. This absence is sometimes due to the rearrangement of unit 

 characters under the influence of hybridization of species. 



" 5. The variegation may be (i.) albinism, or (ii.) dark purplish- 

 brown stripes along the chief veins." 



Examples exhibited : — 



(1) P. denticulatwm 



X P. filicifolium 



(seedlings 



F 2 



generation) 



(Fx showed slight variegation similar to set B). 









Varie- 



Not 









gated. 



variegated. 





Total. 



Set A 



• 3 



9 





12 



Set B 



• 5 







24 



Set C 



. 2 



5 





7 



Totals . 



. 10 



33 





43 



(2) Hybrids of P. citriodorum minor, F 2 generation 



(in 



which varie- 



gation first appeared). 



3 (2 barren) 4 7 

 F s generation (from variegated hybrid above). 



Set D ... 3 8 11 



(3) Hybrids of P. cor datum, F x generation. 



Set E ... 1 3 4 



(4) Hybrids of P. 1 Cataract ' ( = P. Radula x P. denticulatum) 



X P. denticulatum. 



Dark Centre. Plain. 

 Set F .. . 4 5 9 



" Note also dark stripes in leaves of hybrid Pelargoniums ' Patience ' 

 and ' Felicity ' (P. tomentosum x P. filicifolium) and P. tomentosum 

 Smithii (P. tomentosum x P. denticulatum)." 



The variegation was as a rule but poorly marked, and in many took 

 the form of a very narrow, whitish line round the margin of the leaf. 



