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THE AMEBIC AN NATUBALIST [Vol. LI 



proportions throughout. The stout tube, swollen infun- 

 dibulum, and pentagonal limb are clearly derived from 

 macrophylla, and the color is rose red of approximately 

 the same depth and tone as that of macrophylla and in 

 striking contrast to the pure white of sylvestris. In habit 

 the hybrids resemble macrophylla. In early growth they 

 are not characterized by the long maintained rosette 

 which is so characteristic of sylvestris, and in leaf distri- 

 bution, branching, and type of inflorescence they again 

 correspond to their macrophylla parent. 



When an entirely different set of characters is con- 

 cerned in the Tahacum parent the hybrid with syl- 

 vestris is still an exact replica of the particular Tahacum 

 used. For instance N. angustifolia (Setchell, I. c, p. 9) 

 and sylvestris give a hybrid which is entirely different in 

 general appearance and all details from that obtained 

 between macrophylla and sylvestris, and which displays 

 throughout the angustifolia characters. The leaves of the 

 hybrid are obliquely ovate-lanceolate and taper gradually 

 to a long, curved point. They are also distinctly petioled 

 like those of angustifolia. These characters are in strik- 

 ing contrast to those characteristic of the leaves of syl- 

 vestris, which are broad throughout, broadly pointed, and 

 have a broad clasping base. When flower characters are 

 examined, angustifolia is again faithfully reproduced in 

 the Fj hybrid for its flowers have the slender, straight 

 corolla tube with practically no suggestion of an infun- 

 dibulum and the deeply divided limb with narrow lobes 

 that taper into long slender tips, all so characteristic of 

 angustifolia. Like those of angustifolia the flowers are 

 pink. In habit these hybrids again resemble angustifolia. 

 This resemblance is displayed in a particularly striking 

 fashion in the graceful, drooping manner in which the 

 leaves are borne in markod contiast to the stiff, erect 

 manner in which the h\'iv('s ais' 1)()i'iie by sylvestris. 

 Throughout, macrophglhi niul inniiisfifolia present a 

 strikingly contrasted set of fliaractiTs, yet in each case 

 they are reproduced in their ontiroty in of the hybrid 

 with sylvestris. 



