R. poukhanensis x Dazzler (U.S.D.A.) 



X Zulu (U.S.D.A.) 

 X Rose Greeley (Gable) 



R. kaempferi x Rose Greeley (Gable) 



By the use of supplemental light in the greenhouse during the winter 

 we hope to be able to accomplish the equivalent of several years of growth 

 in one year and thus produce an F2 generation for the field sooner than 

 could be done out-of-doors. 



Calla 



In 1950, the Yellow Calla. Zantedeschia elliottiana Engler, was crossed with 

 the Pink Calla, Z. rehmannii Engler, in an attempt to produce a dwarf, 

 dark red calla that would make an attractive pot plant. An Fj population 

 of 20 cream-colored and 6 pinkish-cream colored flowers resulted. The pink- 

 flowered plants had a few white leaf spots and pale green leaves. Seeds 

 from the pinkish-flowered plants produced only ¥> seedlings of the same 

 flower color but with darker green leaves than their parents. The cream 

 colored flowers occurred on vigorous plants having dark green leaves and 

 many white leaf spots. Seeds from these yielded an F^ of 360 plants, all 

 having cream colored flowers. When backcrossed to the yellow parent, the 

 progeny had only cream colored flowers in various shades. 



In 1953, another attempt was made to produce a red flowered calla by 

 crossing the white flowered species, Z. albo-maculata Baill., with the Pink 

 Calla. Pale pinkish flowered hybrids appeared in the first generation. From 

 these a second generation may be grown when viable seeds are obtained 

 from the hybrids. 



To further test the breeding behavior of these callas, the cross. Yellow 

 X White, Z. albo-maculata was made. All the progeny bore pale cream 

 flowers, 4 out of 17 being nearly white. The leaf shape of these hybrids 

 varied at random between the limits of the parent types. 



Granite Series of Chrysanthemums 



FoUowing the collection of the wild Chrysanthemum sibiricum in the Pouk 

 Han mountains of Korea by E. M. Meader in November, 1947, seeds were 

 mailed to A. F. Yeager in Durham, New Hampshire. There the new plants 

 proved fully winter hardy. Thus it became possible for crosses to be made 

 with garden varieties. Male-sterile plants of C. sibiricum were caged with 

 Nashua, Sunapee, Welcome, and several other varieties in the greenhouse. 

 House flies which were released within the cage accomplished easily what 

 would otherwise have been difficult cross pollinations. Reciprocal crosses and 

 backcrosses were also made by a similar procedure. Thus it was possible 

 with but little effort to grow several generations involving hundreds of 

 seedlings. 



At no time was winter protection given to the field-grown seedlings and 

 those propagated for testing had to withstand at least three successive 

 winters in the open field before being considered for final selection. Those 

 having blossoms readily injured by the first faU frosts were discarded as 



