Citrus reticulata x paradisi

(Ugli® Fruit, Uniq Fruit, Unique Fruit)

Taxonomy

Domain: Eukaryota Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Plantae Haeckel, 1866 - Plants
  - Subkingdom: Viridaeplantae Cavalier-Smith, 1981 - Green Plants
    - Phylum: Tracheophyta Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
      - Subphylum: Spermatophytina (auct.) Cavalier-Smith, 1998 - Seed Plants
        Infraphylum: Angiospermae auct.
        Class: Magnoliopsida Brongniart, 1843 - Dicotyledons
        Subclass: Rosidae Takhtajan, 1967
        Superorder: Rutanae Takhtajan, 1967
        Order: Rutales Perleb, 1826
        Suborder: Rutineae
        Family: Rutaceae (ROO-tuh) Durande, 1782, nom. cons. - Rue Family
        Subfamily: Citroideae
        Tribe: Citreae
        Genus: Citrus (SIT-rus) Linn., Sp. Pl. 782. 1753. Gen. Pl. ed. 5341.1754 - Citrus
        Specific epithet: reticulata x paradisi
        Botanical name: Citrus reticulata x paradisi

Physical Description

Family Rutaceae:

The Rutaceae are herbs, shrubs, and trees with glandular punctate, commonly strongly smelling herbage comprising about 150 genera and 1,500 species that are further characterized by the common occurrence of spines and winged petioles. The leaves are alternate or opposite, simple or palmately or pinnately compound, or sometimes heathlike or reduced to spines; stipules are absent. The flowers are often sweet-scented, nearly always bisexual, and are actinomorphic or sometimes zygomorphic. The calyx consists of 3-5 distinct or basally connate sepals and the corolla consists of 3-5 distinct or sometimes connate petals or rarely the petals are lacking. The androecium consists of distinct or sometimes connate stamens that are commonly obdiplostemonous, that is in two whorls with the outer whorl opposite the petals. However, sometimes there may be (1)3-4 whorls or rarely up to 60 stamens. The gynoecium consists of a single compound pistil of commonly 2-5 or more, often incompletely connate carpels that may be united only basally or apically, either one or an equal number of styles, and a superior ovary with usually 2-5 or more locules, each bearing 1-several axile ovules. Generally, an intrastaminal nectary disk is situated between the stamens and the ovary. The fruit is variable. -- Gerald Carr.

Genus Citrus:

Evergreen, small trees or shrubs, often spiny. Leaves simple, alternate, glandular punctate, petiole winged or margined. Flowers perfect or staminate, solitary or clustered in axillary racemes. Calyx 4-5-lobed, glabrous or pubescent. Petals (4-) 5(-8). Stamens 4-10 times the petals, polyadelphous. Ovary 10-14-locular, ovules biseriate or collateral. Fruit a fleshy hesperidium, globose to mamillate-oblong to oblate, rind tight or loose, with oil glands. Seeds embedded in pulpy vesicles.

Most or all of the species are cultivated, derived from the native species of tropical and subtropical regions of SE. Asia. Because of its great economic importance, domestication, cultivation and hybridization of the species has led to many varieties and forms, thus providing taxonomic problems. The following account of the species is primarily based on the work of Tanaka & Swingle with modifications in the treatment of the varieties.

Tanaka has described over 100 species. A genus widely cultivated.^[1]

Habit: Deciduous.

Flowers: Bloom Period: March.

Distribution

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Growth

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Culture: Space 36-48" apart.

Soil: Minimum pH: 7.6 • Maximum pH: 9.0

Sunlight: Sun Exposure: Full Sun.

Temperature: Cold Hardiness: 9a, 9b, 10a, 10b, 11. (map)

Similar Species

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Members of the genus Citrus:

More Info

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Notes

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Contributors:

Brands, S.J. (comp.) 1989-2006. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed October 11, 2006.

Identifiers:

Zipcode Zoo Species Identifier: 957099

Footnotes:

"Citrus". in Flora of Pakistan Page 19. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

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Last Revised: May 26, 2008