Trifoliate Orange

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Related to Poncirus: trifoliate orange, Trifoliate citrus
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Trifoliate Orange

 

(Poncirus trifoliata), the only species of the plant genus Poncirus of the family Rutaceae. A strongly branched small tree reaching 3 m in height, the trifoliate orange has deciduous trifoliate leaves and strong, sharp axillary thorns. The flowers are bisexual, white, and odorless; they are axillary and appear singly or in pairs. Flowering occurs before the leaves open. The greenish yellow spherical fruits are small, measuring 3–5 cm in diameter. They are many-seeded and have a bitter pulp. The rind is aromatic, slightly pubescent, and quite thick. The juice contains about 5 percent citric acid.

The trifoliate orange grows in North China. In the USSR it is raised in regions where citrus crops are grown as stocks. The plant tolerates brief frosts to – 25°C. Propagation is by seed. The trifoliate orange is used in selective breeding for developing more winter-hardy intergenus and interspecies hybrids of citrus crops.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
Methanol extract of Poncirus trifoliata fruits appeared displayed MIC values with a range of 131 to 262 [micro]g/mL against six pathogenic bacteria.
The effect of mycorrhizal inoculation on the rhizosphere properties of trifoliate orange (Poncirus trifoliata L.
If you havenAAEt planted with an eye toward winter interest, your beds will remain bare for another nine to 10 weeks.For example, flying dragon hardy orange (Poncirus trifoliata AoFlying DragonAo) can provide a classical or contemporary sculptural element when it loses its leaves in winter.
Along with the stranger plants such as prickly rhubarb and Poncirus trifoliata - better known as flying dragon - which features barbs that look like highly sharpened cat claws - the Gosslers have specialized for decades in magnolias.
University of Florida (Gainesville, FL) has patented nucleic acids and polypeptides identified and isolated from Poncirus trifoliata, a sexually compatible close relative of Citrus.
(1998) showed that genetic distance among markers varied among populations in Poncirus trifoliata (L.) Raf.
Dirt they are like his children and he knows them by name: candlestick plant, "turk's turban," hardy orange (Poncirus trifoliata), and swamp sunflower (Helianthus angustifolius).
Heinrich (1969) employed aqueous 1% osmium tetroxide alone to fix glandular tissues of Citrus limon, Ruta, and some Poncirus Raf.
Conifers will take a lot of bashing but nothing can quite match bitter orange (Poncirus trifoliata) and berberis.