1912] Setchell: Studies in Nicotiana 5 



ing it as one of the factors are discussed in a paper which it 

 is hoped may be published later. 



"Cavala" 



U. C. B. G. 05. — The seed from which the plants were raised 

 and continued under this number in our botanical garden was 

 obtained from the United States Department of Agriculture. 

 They were labelled "Cavala Tobacco" and w^ere No. 11497 of 

 the U. S. D. A., obtained from Turkey. The habit and general 

 characters of the plant are well represented in the photograph 

 reproduced on plate 2. It is a tall plant with upper and middle 

 laterals which more or less overtop the original panicle. The 

 leaves are short, compared with those of nearly all the other 

 members of the N. Tabacum-group, peculiarly and more de- 

 cidedly rugose on the upper surface as well as velvety, shaped 



22 



more like those of 07 {Nicotiana Tahacum var. macrophylla 

 Comes) but more tapering towards the base and long and nar- 



oo 



rowly decurrent. The flowers are also nearer to those of 07 

 than to the others. In color, how^ever, they are pink. The lobes 

 are broad and rather shallow, but they are tipped with a short 

 recurved point. The tube is slender below but is stout and 

 broadly infundibuliform above. 



This plant is not to be identified with any of the typical 

 varieties of either Comes or Anastasia. Nor do I identify it 

 with any of the cultivated varieties figured by them. I shall 

 simply call it Cavala and discuss its position and influence in 

 breeding, later. The texture of the surfaces of the leaf and the 

 shape and decurrence of the leaf make it a desirable plant in 

 crossing. 



"Maryland" 



13. 

 TJ. C. B. G. 05. — The seed from which the stock of plants 



designated by this number has been obtained was distributed 



by the United States Department of Agriculture in 1905, and 



designated as "Maryland," with the identifying number "205- 



20-7." In habit, as well as other characters, it is decidedly 



different from the two varieties just described. It is of some- 



