468 University of California Publications in Botany [Vol.5 



gins (or edges) of the petiole is narrow and is prolonged as a slight 

 ridge to the internode and is decurrent (?) or can be traced as it bends 

 sharply downwards. Such wings are, at times, found in pure bred 

 angustifolia plants. This leaf, then, resembles the angustifolia leaf 

 fairly closely, but differs from its ordinary expression in the more 

 tapering base, in being less distinctlj^ conduplicate, in tapering more 

 abruptly toward the tip, in having shorter petioles and in having more 

 of a wing on the margins of the petiole. 



The flower of F^ (see pi. 60) resembles that of angustifolia more 

 than that of macrophylla. The color is deep pink, decidedly of a 

 deeper shade than is the flower of angustifolia, yet far from the red 

 of macropliylla and in a way intermediate between the two. There 

 is no trace, on the limb of the corolla of F^, of the 5 -white triangle- 

 shaped areas so characteristic of the limb of the corolla of macrophylla. 

 The infundibulum. while possibly slightly stouter t-han that of the 

 flower of angustifolia, is not so stout as that of the flower of macro- 

 phylla. In length the flower of F^ averages about 4 to 4.5 cm. as 

 against an average of 6 cm. in angustifolia, and of 4 cm. in macro- 

 phylla. The tube averages about 3.5 to 5 mm. in diameter below, as 

 contrasted with 2.5 to 3 mm. as an average in angustifolia and 5 mm. 

 in macrophylla. The infundibulum in the corolla of F^, while neither 

 abrupt nor so stout as that of the flower of macrophylla, is noticeably 

 more abruptly enlarged and stouter than that of angustifolia. The 

 limb of the corolla in F^ averages 2.5 to 3.25 cm. in greatest diameter, 

 while that of angustifolia averages 3 to 3.5 cm. and that of macrophylla 

 averages about 2.3 cm. in greatest diameter. The lobes of the corolla 

 in Fj are about half the width of the limb from tube margin to extreme 

 tip of lobe, while in angustifolia they are about two-thirds of this and 

 in macrophylla they are only one-third or even less. The lobes, also, 

 are decidedly broad at the base, particularly so as compared with their 

 length. In general, then, the corolla of F^, while closer to that of 

 angustifolia, shows by its stouter tube, more abrupt and more swollen 

 infundibulum, intermediate spread of limb, less deep lobing, shorter 

 and broader lobes, and deeper shade of pink, definite influences of 

 macrophylla also. 



The capsule of F^ is broader than that of angustifolia, but nar- 

 rower than that of macrophylla. There is greater variability in hori- 

 zontal diameter in the capsule of F^, The flower and fruit of F^, 

 then, although no careful biometric study has been made, are inter- 

 mediate between those of the two parents, yet incline more toward 

 angustifolia than toward macrophylla. 



