1912] Setchell: Studies in Nicotiana 19 



pure line, for several j-ears and retains its characters perfectly. 

 The plant in the Linnaean Herbarium is exactly the one cul- 

 tivated in the U. C. B. G. and elsewhere, and which passes 

 universally under this name. 



Nicotiana tomentosa Ruiz & Pa von. 



N. tomentosa is a second "tree tobacco" rivalling N. glauca 

 in height and exceeding it in display as a foliage plant because 



|()8 



of its huge leaves. U. C. B. G. 08 is the number applied to 

 plants of this species grown in Berkeley, where one plant has 

 survived three winters outside, the first under protection of 

 a cheese-cloth tent and with some heat at nights, the second 

 and third without protectioii. It is now a bushy plant of spread- 

 ing habit, about twelve feet high, and has blossomed thrice, but 

 since it begins to blossom in midwinter, few of the earlier blossoms 

 arrive at anthesis. Some of the latest do, however, and in the 

 present year (1912), it has produced abundant panicles for 

 several months. The shape of the corolla is nearest to those of N. 

 glutiiiosa, being obliquely inclined, very gibbously inflated into a 

 broad funnel above and nearly bilabiate. The color is light yellow 

 tinged with red. The style and stamens are exserted, projecting 

 fully as much as the length of the corolla. Both flowers and leaves 

 are well figured by Hooker (1892, pi. 7252). On account of the 

 peculiarities of the flower, Sprengel (1817, p. 458) made it the 

 type of his new genus, Lehmannia. It was named by Andre 

 (1888, p. 511) Nicotiana colossea, and it has appeared in gar- 

 dens and has been cultivated as a foliage plant under this 

 name. It is usually raised under glass and placed outside only 

 in the warmer season. It begins to flower in the U. C. B. G. 

 in December and continues to do so for several months. It is 

 a native of Brazil and Peru. A small plant grown from a cutting 

 is represented in plate 22. 



Section III. Petunioides G. Don. 



The species of Nicotiana belonging to the Petunioides-^Qoiion 

 have salver-shaped corollas, which are white or tinged with red 

 or purple, arranged in racemes or panicles. In this section, 



