Breeders have crossed Poncirus with citrus to produce cold-hardy hybrids.
育種家はポンシルス属と柑橘類を交配して耐寒性のある雑種を作った。
A genus in the Rutaceae sometimes treated by botanists as part of the genus Citrus, valued for species used in creating cold-tolerant citrus hybrids and as rootstock.
