182 Genetic Behaviour of tit e Hybrid Primula Kewensis 



DESCRIPTION OF PLATES. 



PLATE XXV. 

 Fig. 1. Primula fioribunda. 

 Fig. 2. P. verticillata. 



Fig. 3. P.fluribuiiclaxverticillata. The diploid Fj , first obtained at Kew. Figure kindly 

 supplied by Sir Harry Veitch. 



PLATE XXVI. 



Fig. 4. The plant numbered }|. See text. 



Fig. 5. P. Ken^L'nsis, tetraploid, with some double flowers; seen at Messrs Veitch's. 



PLATE XXVII. 



Fig. 6. Leaf of P. rerticillatti. 



Fig. 7. Leaf of P. floribuiiihi. Note the hairs. 



Fig. 8. Leaf of P. Kewensis, diploid. 



PLATE XXVIII. 



Fig. 9. Leaf of P. Kewensis, tetraploid. 

 Fig. 10. Leaf of ditto, mealy variety. 

 Fig. 11. Leaf of IS. 



The leaves are all shown as seen from the dorsal surface. 



PLATE XXIX. 



Figs. 12 — 16 show the series of colours which occur among the derivatives of the 

 cross fliiribiiiubi x 5|. 



Fig. 12. Light isabellina. 



Fig. 13. Isabellina. * 



Fig. 14. Lemon. 



Fig. 15. Light yellow. 



Fig. 1(3. Dark yellow. 



Fig. 17. Diploid Keicensis. 



The coloured drawings represented in these Plates were made by Mr Osterstoek from 

 the plants. The reproductions are fairly accurate, but in the originals the distinctions 

 between the colour-varieties are somewhat more pronounced. 



