Success that were given good culture withstood — 25° F. with only slight 

 injury to the top during the winter of 1956-57 in New Hampshire. Because 

 of its hardiness, productiveness, fine flavor, and easy culture. Success rasp- 

 berry should appeal strongly to those home owners who choose to grow 

 raspberries. On markets that are accustomed to purple raspberries, Success 

 may also prove to be a fine commercial market variety. 



Rubus Pungens Crosses 



A special strain of Rubus pungens oldhami was introduced by Mr. E. M. 

 Meader in 1947 from Korea. This low-arching and decumbent species is 

 partially hardy at Durham. It has pink flowers, borne singly, followed by 

 fruits that are large, orange in color, and very acid. Its valuable outstanding 

 characteristic is extreme earliness. Here in southern New Hampshire it 

 ripens around June 20. When Rubus pungens oldhami was crossed with 

 black raspberry it made partially sterile F^ plants which bore fruits with 

 garnet-colored druplets. When the second generation was raised, most of 



the seedlings had little value. One or 



».».«. j^^j looked good enough so that seeds 



from them have been grown for an 

 open-pollinated third generation. 



When pollen of Rubus pungens 

 oldhami was used on Taylor red rasp- 

 berry as a female parent, Fj plants 

 resulted that were productive and 

 rather hardy; yet, not valuable 

 enough to be a variety in themselves. 

 An F2 population of several hundred 

 seedlings was raised from these hy- 

 brid plants. As might be expected 

 there was great variability. The 

 plants varied from tip-layering 

 spreading low plants to upright plants 

 resembling red raspberry. Only a few 

 seedlings had pink flower color si- 

 milar to Rubus pungens oldhami. 

 Most seedlings had red fruits, al- 

 though there were some plants with 

 orange and some with yellow fruits. 

 Among them were several that had 

 attractive large fruits that ripened 

 the latter part of June. These were 

 selected for testing in short rows. One selection, with red fruits somewhat 

 more tart than most red raspberries, has been found to make good preserves. 

 Another early-ripening selection has large yellow berries and fruited from 

 June to frost in 1957. Whether any of these will become a variety remains 

 to be seen. Several have potentialities for the introduction of genes for extra- 

 early ripening into cultivated raspberries. Seeds from several of the best 

 selections have been saved for another generation. Also crosses have been 

 made with certain selected everbearing raspberries. 



A softH'oofl cutting from the Success 



raspberry which has been rooted in a 



sawdust medium using intermittent 



mist. 



16 



