1912] Setchell: Studies in Nicotiana 11 



one of the plants usually known in gardens under that name. 

 It is tall, six feet high or over, with large deep-red flowers, 

 of the same shape as, though with rather deeper color than, 



22 



those of .Y. Tahacum var. macrophylla (ef. U. C. B. G. 07). 

 N. sangninea is designated by Comes (1899, p. 20) as "N. Tah- 

 acum var. macrophylla purpurea,' ' but it is to be noted that 

 he expressly states that his .Y. Tahacum var. macrophylla pur- 

 purea includes both .Y. sanguinea and N. purpurea of the gar- 

 dens, but only partially as to each. These two garden tobaccos 

 vary in height, robustness, and color of flower. Even the shape 

 of the flower varies among the different plants referred here. 

 The leaves are ample, with f&irly long, broad-winged petiole, 

 broadly ovate blade, which is more or less cucuUate at the tip. 

 There are combined in this plant characters of our .Y. angusti- 



folia (U. C. B. G. 07) as to petiole, .Y. Tahacum var. hrasiliensis 



(our Brazilian, U. C. B. G. Oo) as to cucullate tip, tallness, and 



perhaps also the wing on the petiole, and N. Tahacum var. macro- 



22 

 phylla (cf. U. C. B. G. 07) as to flowers. I have produced plants 



similar to this, but lacking tallness and the cucullate tip to the 



blade of the leaf, in F, from crosses between U. C. B. G. 07 and 



07. X. sanguinea, at least so far as U. C. B. G. 06 is concerned, is 

 a poor and uncertain seeder. This leads one to suspect a pos- 

 sible hybrid origin. It has bred true in the U. C. B. G., how- 

 ever, for several years. This tobacco is grown, chiefly at any 



rate, as an ornamental plant. U. C. B. G. 06 is well represented 

 in plate 8. The two garden species, known as .Y. sanguinea and 

 N. purpurea vary in height and robustness but those with the 

 darker flowers are called N. purpurea while those with the lighter 

 flowers are called .Y. sanguinea. 



Section II. Rustica G. Don 



In this second section of the genus are placed all the yellow- 

 flowered species and varieties. The color is usually simply yel- 

 low, but, at times, in certain species, it may be mixed with red 

 or even with white. The shape of the corolla varies much. It 

 may be infundibuliform, hypocraterimorphous, ventricose, or 



