Flying Dragon (Poncirus trifoliata): A unique and exotic citrus relative, Flying Dragon is a deciduous, very dwarf tree with attractive, contorted branches and equally attractive, hook-shaped thorns.

The degree of polyembryony in progenies of 88 citrus hybrids derived from crosses between monoembryonic 'Clementine' (C. reticulata Blanco) as seed parent, and Poncirus trifoliata Raf., sour orange (C ...

Everything below the graft union is something else entirely (such as trifoliate orange, Poncirus trifoliata Rubidoux) — called the rootstock.

Citrus tristeza virus (CTV) is the major virus pathogen causing significant economic damage to citrus worldwide, and a single dominant gene, Ctv, provides broad spectrum resistance to CTV in Poncirus ...

P. trifoliata is blissfully free of pests and diseases. Reader offer Gardening readers can buy a container-grown Poncirus trifoliata for £10.95, or two for £17.90.

Well, “dragon” was a great clue but the photo was a dead giveaway. You were looking at a plant known as Poncirus trifoliata “Flying Dragon” (pon-SIGH-rus tri-fo-lee-AH-ta).

However, I do believe that there is a hardy citrus tree (or relative) growing on Monte Sano – appropriately named the Hardy orange (Poncirus trifoliata pon-SIGH-rus try-foh-lee-A-tuh) or Bitter ...