8 University of California Publications in Botany [Vol. 5 



says further : "I found the ordinary pink-flowered form and 

 the white one growing as wayside weeds and gathered a con- 

 siderable quantity of the white form because of its striking 

 appearance. From the occurrence of the plants I should sup- 

 pose that there was every reason to anticipate crossing of the 

 two forms but, so far as I knew of it, all of the seedlings that 

 we raised from the white seed bred true." Our experience has 

 been that it breeds true when protected by bag, but one year, 

 seed which had been taken from an unprotected plant gave a 

 pink-flowered form whose bagged seed, in turn, gave a consider- 

 able variety of colors, stature, etc., in the plants raised from 

 them. 



The White Tobacco as we have called it, is a tall plant, 

 up to six feet high and over, of simple habit, only the upper 

 flowering laterals developing. It is well shown in the photo- 

 graph reproduced in plate 5. The leaves are much like those 



22. 

 of N. Tabacum var. macrophylla Comes (U. C. B. G. 07) except 



that they are more rounded at the middle, have a decidedly 



prolonged point, and are rugose and downy above. The flowers 



22 

 are like those of U. C. B. G. 07 except in color. 



This is a most interesting plant. It has the habit more 



72 

 of the Cavala (U. C. B. G. 05) of which it has also the pecul- 

 iarities of the surface of the leaf (both rugosity and downiness). 

 It has, however, the general leaf-shape and flower-shape of 



22 



U. C. B. G. 07 (N, Tabacum var. macrophylla Comes), and 

 these are combined with an apparently albino character 

 in the flower. It is a poor seeder, a characteristic pointing 

 toward a possible hybrid origin. The seed is apt to be both 

 comparatively scanty and of poor germinating power. 



Nicotiana Tabacum var. macrophylla 



22. 



U. C. B. O. 07. — This is the Nicotiana Tabacum var. macro- 

 phylla of Comes and was grown from seed kindly supplied by 

 Professor Comes from his plants at Portici near Naples. It 

 has the essential characteristics described and figured by him 

 for this variety (cf. Comes, 1899, p. 18, pi. VIII), but does not 



