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Latin Name
Citrus reticulata
English Meaning
A shrub or small tree having flattened globose fruit with very sweet aromatic pulp and thin yellow-orange to flame-orange rind that is loose and easily removed; native to southeastern Asia. The word “citrus” originated with the Romans as it was used to refer to plants that possessed a scent.
mandarin orange photo taken by myself
The Citrus reticulata tree generally has thorns and thin twigs with wide, dark green, shiny leaves that are alternately arranged. Its flowers bloom either singly or in a small group in the leaf axils. Its fruit, known commonly as the mandarine or tangerine, is bright orange when ripe and oblate. The mandarin is considered to be a hesperidium, which is a type of berry or fleshy, multiseeded fruit. The outer shell of the mandarin is leathery and the inside of the peel is more spongy and light in color. This part, which can also be referred to as the “rind”, has many glands which contain aromatic oils. These oils are what gives the fruit its strong scent. When peeled, it is found to be segmented and contains pointed seeds inside which are sometimes referred to as “pips”.
Appearance
Domain: Eukarya
Kingdom: Plantae
Subkingdom: Tracheobionta
Superdivision: Spermatophyta
Division: Magnoliophyta
Class: Magnoliopsida
Subclass: Rosidae
Order: Sapindales
Family: Rutaceae
Genus: Citrus L.
Species: Citrus reticulata
Classification
Domain: Eukarya
Citrus reticulata belong to the Eukarya domain because all of its plants are eukaryotic, meaning they are organisms containing cells with a nucleus, their cells are organized into complex structures enclosed within membranes, and resemble all of the other features of eukaryotes.
History
It originated in China and Japan in the 16th century where it was grown in large quantities. In the 19th century, it was brought to Europe as one of the last citrus fruits. England introduced the mandarin to the Mediterranean region in the 19th century as well. Italy took this citrus tree and introduced it to the new world, in specific, New Orleans, in the mid 1800s. It was not until the early 1900s that commercial production of the mandarin began to become popular.
mandarin oranges (Wikimedia Commons)
Subkingdom: Tracheobionta
Citrus reticulata belong to the Tracheobionta subkingdom because they are vascular plants, meaning they have true conducting tissues (phloem and xylem) for seconary growth.
Superdivision: Spermatophyta
Citrus reticulata belong to the Spermatophyta superdivision because they are seed plants.
Division: Magnoliophyta
Citrus reticulata belong to the Magnoliophyta division because they produce flowers.
Class: Magnoliopsida
Citrus reticulata belong to the Magnoliopsida class because they are dicots, which can be seen by the presence of two cotyledons in their seeds as well as non-parallel veins.
Subclass: Rosidae
Citrus reticulata belong to the Rosidae subclass because they have binucleate pollen, corolla with separate petals and ovules that generally have two integuments.
Order: Sapindales
Citrus reticulata belong to the Sapindales order because this order includes shrubs, trees, and woody vines.
Family: Rutaceae
Citrus reticulata belong to the Rutaceae family because they have pellucid glands in their leaves, which give the plant its aroma and their flowers are pollinated by insects.
Genus: Citrus
Citrus reticulata belong to the Citrus genus because they are large shrubs or small trees, have spiny shoots, numerous stamen, alternately arranged evergreen leaves, and are known for their fragrance. Some of the Citrus reticulata’s relatives include the Key Lime, Pomelo, and Citron.
Phylogenetic Tree
Moving on to the Habitat and Growth...
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This phylogenetic tree below shows the 29 accessions of Citrus and its related genera. The numbers on the nodes are the values from AFLP data. Genotypes are clustered into nine sections based on this tree. (1) C. aurantium, C. sinensis along with three mandarin genotypes and C. tachibana. (2) C. maxima, C. paradisi, C. limon, C. honghensis and C. latipes (3) Two C. aurantifolia genotypes, C. limonia, C. jambhiri and C. medica, (4) C. hystrix, (5) C. ichangensis, (6) Two Fortunella geno- types and C. halimii, (7) Three trifoliate orange genotypes and Fumin trifoliate orange, (8) Micro- citrus and Eremocitrus, (9) Atalantia and Severinia.
Kingdom: Plantae
Citrus reticulata belong to the Plantae kingdom as they are, as stated in the English meaning, shrubs or small trees. They have a large central vaculoe, cell walls made of cellulose, contain chloroplasts, and are angiosperms.
Phylogenetic Tree Figure 1 (Genetic Resources and Crop Evolution)
Phylogenetic Tree Figure 2 (Theor. Appl. Genet.)
Here is another phylogenetic tree for 40 ge-
notypes of Citrus and related genera derived from bootstrap analy-
sis (500 replications) of RAPD and SCAR data. This dendrogram indicates that the genus Citrusis is fairly distant from the Poncirus, Microcitrus and Eremocitrus but not from Fortunella.