New York Agricultural Experiment Station. 563 



proved to be utterly self-sterile. The stamens of one of this class, 

 Oneida, have not been observed. Of the remaining thirty-nine 

 varieties, nine have long stamens and thirty have short stamens. 



Eleven specimen vines, representing as many native species, 

 were under observation. Three had long stamens and were self- 

 fertile. Of the eight kinds which had short stamens three were 

 self-sterile and the rest were self-fertile, one kind producing clus- 

 ters which, though loose, were sufficiently well developed to be 

 classed as marketable. So far as known all cultivated grapes which 

 can develop marketable clusters when self-fertilized have long 

 stamens; nevertheless the fact that a variety has long stamens can- 

 not be accepted as a sure indication that it is self-fertile. On the 

 other hand the fact that a cultivated variety has short stamens may 

 be taken as pretty sure evidence that it is self-sterile, cither com- 

 pletely or to such a degree that it cannot of itself produce marketa- 

 ble clusters of fruit. 



