466 University of California Puhlications in Botany [Vol.5 



The leaves of macrophylla are sessile by a partially clasping base 

 and possess two basal lobes partially clasping the stem. The general 

 shape is obovate, the widest portion being above the middle. The 

 leaves taper gradually to the broad clasping base below and abruptly 

 to a narrow more or less acuminate tip above. The surfaces show the 

 secondary veins branching at a more obtuse angle than do those of the 

 leaves of angustifolia. The color of the leaves is a dark green in 

 macrophylla and more of a yellowish green in angustifolia . In every 

 way, then, the leaves of the two parents differ from each other as much, 

 in fact, as do the leaves of many species. 



The flowers of macrophylla, while of the same general type as those 

 of angustifolia, differ in details of shape and color. The flowers of 

 macrophylla are about 4 cm. long. The calyx is broadly ovate in pro- 

 file, deeply cut into 5 broad and somewhat unequal lobes. The corolla 

 tube is stout cylindrical (about 5 mm. in diameter) below, broaden- 

 ing suddenly into a stout infundibulum above (about 10 mm. in diam- 

 eter). The limb is at right angles to the tube, is about 23 mm. across, 

 and is more or less pentagonal with 5 shallow sinuses. The color of 

 the corolla is deep red fading to an almost lilac tint after anthesis. 

 On the limb are 5 triangular lighter areas, one having the narrow 

 apex at each sinus and the broad base at the top of the tube. In the 

 much darker color, in the broader tube and stouter infundibulum, and 

 in the barely appreciable lobing of the limb, the corolla of macrophylla 

 is the antithesis of that of angustifolia. In stamens and pistil, the 

 flower of macrophylla shows little variation from that of angustifolia. 



The capsule of macrophylla is broadly ovate, tapering abruptly to 

 a mucronate tip. It is about 2 cm. high and about 1.5 cm. in diameter, 

 contrasting very decidedly with the comparatively slender capsule of 

 angustifolia. 



A typical plant of macrophylla is shown iu plate 55, figure 2. 

 Typical features of the plant are shown in line drawings in plate 57. 

 Photographs of leaves are reproduced in plate 58, where they may 

 be compared directly with those of angustifolia. In plate 60 its flowers 

 may be compared directly with those of angustifolia and with those of 

 the hybrids. 



It has seemed best to call attention to the characters of and differ- 

 ences between these two varieties, parents in the first set of crosses to 

 be discussed, in order that the behavior of their hybrid progeny may 

 be clear. In height and habit there is a close agreement, but in leaf, 

 flower, and fruit there are sufficient differences to mark them as sep- 

 arate species. 



