Corylus americana

It was decided first to cross Rush, a selected form of _Corylus americana_, with the best varieties of _Corylus Avellana_, Rush contributing the hardiness of the native hazel, possible resistance to filbert blight, and the hybrid vigor that sometimes results from the crossing of two species.

Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting Guelph, Ontario, September 3, 4, 5, 1947

The inter-crossing of selections of _Corylus americana_ does not appear to be a promising line of attack in filbert breeding where hybrids with _C.

Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting Guelph, Ontario, September 3, 4, 5, 1947

We do know that when the cross is made that the _Corylus americana_ variety must be the seed-parent.

Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952

As mentioned, one species, _Corylus americana_ Walt., is native to much of Virginia.

Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948

The hybrids between the Rush variety of Corylus americana and various varieties of C. avellana produced by the late J.F. Jones are very much worth while.

Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946

The one which is most prized, _Corylus americana_, is found over a wide range of territory and abundantly in many places between

Northern Nut Growers Association, report of the proceedings at the sixth annual meeting Rochester, New York, September 1 and 2, 1915

At that time the collection consisted of 28 varieties; today there are under test at Geneva 99 varieties of Corylus avellana, five varieties of Corylus americana, five Jones seedlings, and six species of Corylus, or a total of 115 forms.

Northern Nut Growers Association Report of the Proceedings at the Twenty-Fourth Annual Meeting Downington, Pennsylvania, September 11 and 12, 1933

Zellernuss, Neue Riesennuss, Eickige Barcelonaer, and Winkler and Rush, the latter two being varieties of Corylus americana.

Northern Nut Growers Association Report of the Proceedings at the Twenty-Fourth Annual Meeting Downington, Pennsylvania, September 11 and 12, 1933