1912] Setchell: Studies in Nicotiana 13 



lessor Comes and the plant has held its characters in the U. C. 

 B. G. since 1907. It comes near to N. rustica var. jamaicensis 



Comes (U. C. B. G. 07) in its spreading habit, but the leaves 

 are more cordate than in the latter variety. The photograph 

 reproduced in plate 9 represents one of the less ample plants. 



Nicotiana rustica var. brasilia 



13. 

 TJ. C. B. G. 07. — Nicotiana rustica var. brasilia Schrank 



(1807, p. 264) as interpreted by Comes (1899, p. 22, pi. II, XI), 

 is a fairly tall, robust plant, very distinct from the other varieties 

 of N. rustica. The stem is stout, clothed below with large, thick 

 heart-shaped leaves which are decidedly rugose. The panicle, 

 when well developed, is long tapering and of massive appear- 

 ance, with crowded flowers. This is well shown in the photo- 

 graph reproduced in plate 10. Later, by the growth and flower- 

 ing of the laterals, the panicle appears more spreading, as repre- 

 sented in the plate of Comes (1899, pi. XI). The seed came from 

 Professor Comes and the plants have preserved their charac- 

 teristics when bred in the pure line, in the U. C. B. G., since 

 1907. 



Nicotiana rustica var. humilis 



1± 

 TJ. C. B. G. 07. — Nicotiana rustica var. humilis Schrank (1807, 



p. 261), as interpreted by Comes (1899, p. 23, pi. II, XIII), 

 is a fairly robust plant, but of low stature and early blossom- 

 ing and ripening. A fairly typical plant is represented in 

 plate 11. The leaf is broad and ovate, being broadly, but slightly 

 cuneate at the base. The panicle is comparatively simple. This 

 variety is nearer to N. rustica var. jamaicensis Comes than to 

 any other variety, but is more simple in habit and with leaves 

 more perfectly ovate with the base more cuneate and even. The 

 seeds were obtained from Professor Comes and the plant has 

 held its characteristics in the U. C. B. G. since 1907. This species, 



14 



at least as represented by No. 07, comes near to N. rustica var. 



J7 



texdna, at least as represented by U. C. B. G. 07. The two plants 

 are still being studied. 



