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Citrumelo (× Citroncirus spp.) is also called Swingle citrumelo trifoliate hybrid, because it is cold hardy and is a hybrid between a 'Duncan' grapefruit and a trifoliate orange (Poncirus trifoliata (L.) Raf.), developed by Walter Tennyson Swingle.
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grapefruit citrus hybrid orange poncirus cold trifoliata citroncirus called swingle trifoliate blight fahrenheit spp also hardy 'duncan' raf developed walter
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Citrumelo | Hybrid parentage | Poncirus trifoliata (Japanese bitter orange) x Citrus × paradisi (grapefruit) | 1.00 | infobox |
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