450 l\ Cd.M'KliKNCI': INTKliNATIONAI.K liK (.KM-TinCb:. 



NICOTIANA CROSSES' 



By M Rose Haig THOMAS 



Mcivl..^ Ciillil l;ii];;\vi„..l ii:ri;;l.-.nili. 



l\. Sanderie X N. a f finis F, 



1908 seed. Segresration of tolour in F 



7) colors examineii : 

 in'RPi.E 



Lower surfuci' : Upjter surface : 



P. dilule. P. concenlraled and dilule. 



W. consideralilc iireas. W'.areas oC tlircc cells lo len colis. 



R. absent. U. absent. 



P. cells !.■. ths : \V. cells I 5 tli. 



nEi) 



Loivcr suffnre : Ipitur sinfari' : 



P. absent. P. diliite. 



W. considérable areas. W.small groiips, a lew. 



R. concentrated and dilute. R. absent. 



REU PURPLE 



Loivev surface : T^pper surface : 



P. dilule, a few. ■ P. dilute and concenlialcd uume- 



rous. 

 W. colorlesscells and cells contaiii- \V n l'ew (iiol so nuinerous as in 



ing yellow plastids. P. or R.). 



R. concentrated luimerous. R. dilute and concenirated a few. 



Thèse colors Purple — Red — Red-Purple — are represented in Henri Daullie- 

 nay's " Répertoire de couleurs ", as foUows : 



P. iJaupliin's blue ?sos. 1 and 1. 



R. Tvrean Rose Nos. I, 2, 3 and i. 



R.-P. Turkey Red Nos. I, or Cerise No. 1. 



One may simpliTy this by classing R. and R.-P. logelhcr, wlien in F, \ve 

 get : Red cells présent (R.) 70, Red cells absent (P.) R). 



And one plant wilh : R.-P. lower surface and, W. upper surface. 



In Nicotiaiia the spécial brilliailcy of Tyreau Rose appears lo be due to 

 yellow plastids in the red cells. 



Conslancy of hybrid niulaling type in Fj, F, î'nt' ^r, '■ 



PARENTS : 



Nicoliana Sandcrœ Nicvtiana st/lveshis 



(Ovule Parent) (Pollen Parent) 



C.orolla : Red small. Corolla : \\'hile, small. 



I. ('.nmiiuiiiioatioii faile ;i la Iruisièiiio séance de la r.iiiilV'iviicc. 



