Timme | * | | * | Vladimir | * | | | * | | | | _P. avium_ × | | | | _P. cerasus_ | | | | Abbesse d'Oignies| * | | * | Double Natte | * | | * | Empress Eugenie | * | | * | Late Duke | * | | | * May Duke | * | | * | Nouvelle Royale | * | | * | Reine Hortense | * | | * | Royal Duke | * | | * | ------------------+--------------------------------------+-----+------+---- THE POLLINATION OF CHERRIES We cannot complain in New York of much uncertainty in the setting of the cherry crop. Late spring frosts occasionally catch the blossoms of Sweet varieties but seldom those of the Sour sorts. Cold weather, especially if accompanied by wet weather, not unfrequently cuts short the cherry crop by preventing proper setting. There is, however, no general complaint of poor crops through self-sterility. In fact from the behavior of perfectly isolated trees in all parts of the State it would be premised that the cherry is most nearly self-fertile of all tree-fruits. Yet there may be orchards or seasons in which cross-pollination cuts a figure, for Gardner[54], of the Oregon Station, found in experiments carried on by him in various parts of Oregon that many varieties of Sweet Cherries in the Pacific Coast environment are self-sterile. The work seems to have been very carefully done and the conclusions are worth reprinting in full, bearing in mind that they would be much modified under New York conditions. Gardener found: "1. All the varieties of the Sweet Cherry tested are self-sterile. This self-sterility is in no case due to a lack of germinability of the pollen produced. On the other hand, the pollen of each of the varieties studied is capable of producing a set of fruit on the variety or varieties with which it is inter-fertile. The list includes Bing, Black Republican, Black Tartarian, Coe, Early Purple, Elton, Knight, Lambert, Major Francis, May Duke, Napoleon, Rockport, Waterhouse, Willamette, Windsor, Wood. "2. Certain of these varieties--Bing, Lambert, and Napoleon are mentioned especially--are inter-sterile. Mixed plantings of these three varieties cannot be expected to set fruit unless the trees are within the range of influence of some other variety or varieties that are inter-fertile with them.