ZWANENBURG (Louis A. Denis, 1912). Yellow-toned blend from Lutescens aurea X I. susiana. Counted as a 40-chromosome amphidiploid. All registered offspring are quarterbreds, but could theoretically give fertile seedlings if paired with a compatible amphidiploid. In the following pedigrees, links to Zwanenburg are shown in red

Quarterbred

BROWNIE (Geddes Douglass, 1957). Amber and chocolate, from (Minnie Colquitt x pumila) X Zwanenburg.

Quarterbred

BUFFOON (Mrs. J. M. Baker, R. 1938). Light blue blend from BDB X Zwanenburg

Quarterbred

CALIFA DOTU (Herbert Graves, 1970). S lilac veined deeper lilac to violet; F light red-brown edged light tan; orange beard. Knotty Pine X Zwanenburg

Quarterbred

GREEN GLORY (Ortha Green, R. 1939). Light yellow self from Leota X Zwanenburg

Quarterbred

MOHRESQUE (A. D. Keith, R. 1949). Medium blue bitone blend. Probably Doa X Zwanenburg

Quarterbred

MT. KOSCIUSKO (William P. Aylett, 1933). White self from Kashmir White X Zwanenburg.

Background color indicates fertility.  See Fertile Families.

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