1912] Setchell: Studies in Nicotiana 29 



Nicotiana, although the flowers are a yellowish white. The 

 individuals vary in being more green or more glaucescent. They 

 are straggly, with narrow, broadly lanceolate leaves narrowed 

 at the base and then suddenly expanded into broad, partly 

 clasping auricles. The flowers are in more or less incurved, one- 

 sided racemes. The corolla tube is almost straight tubular, with 

 the limb spreading at right angles or slightly deflexed in full 

 anthesis. The lobes of the limb of the corolla are broad, obtuse, 

 and shallow. The flowers are deep creamy yellowish white. 

 The capsule is nearly or entirely enclosed in the calyx, varying 

 in this respect. Var. pulla Comes (1899, p. 49), var. sordida 

 Comes (loc. cit.) and var. iponiopsiflora Comes of N. trigono- 

 phylla and N. Palmeri Gray (1886, p. 242) seem to belong to 

 the same species. 



Nicotiana sylvestris Speg. & Comes. 



This is one of the most important of the showy species of 

 Nicotiana for garden culture. Spegazzini sent the seeds from 

 Argentina to Comes in 1897 (cf. Comes, 1899, p. 35), and the 

 plant was soon widely distributed in botanical and other gar- 

 dens. It has been grown continuously in the U. C. B. G. since 

 1901. It is a tall, shortlived perennial with long, slender white 

 flowers, pleasantly fragrant after dark. A slender plant just 

 coming into flower is represented in the photograph reproduced 

 in plate 28. The figure of Comes {loc. cit., p. 34) does not well 

 represent the proportions of height, length of leaf, and length 

 of flower as found in the plants cultivated in the U. C. B. G. 

 The plate of J. D. Hooker (1899, pi. 7652) is better in these 

 respects, but the habit-figure does not seem characteristic. The 

 plant represented from the U. C. B. G. is young; older plants 

 branch and become more bushy. The flowers are long and 

 white, with a slight tinge of yellowish outside. The tube is 

 slender, enlarging slightly and gradually above the middle but 

 gradually contracting below the top. The limb is moderately 

 broadly lobed one-third to one-half way in from the margin. The 

 lobes are broadly triangular. The flowers are pendent in bud, 



