US-1515 Kumquat

Originated from open-pollinated seed of "Nagami" kumquat planted at the AH Whitmore Foundation Farm, Leesburg, FL in 1975.^⁠[1]

"Since US 1515, the parent tree from which the mutation occurred originated from open-pollinated seed of 'Nagami' kumquat, it seems likely that this parent was in fact a kumquat hybrid, possibly with mandarin." - When referenced in relation to it's child "Centennial Variegated Kumquat".^⁠[1]