historian consider the precise origins of the lemon tree ( Citrus x limon ) , but many fit it in all probability arose in northern India . Reports of it being grow in Italy particular date to about A.D. 300 and in Iran and Egypt by A.D. 700 . Today , the lemon grows in warm Mediterranean climates around the world where no wintertime frost occurs . Its full , oval leave-taking persist year round and the fragrant violet - tinted white flowers occur in fountain with the fruits ripening months after for crop .

Root System

Providing anchorage and a durable vascular scheme for uptake of water and food in the soil , the radical system of rules of the lemon is the key to survival . The roots grow and arise like above - undercoat limb and branchlet . The thin bark of the fork ascendant protects the water and food - storing cells . At root originate tips , no bark exists , but they take care white and are lined in thousands of root hairs . The hairs increase control surface area to ease uptake of piddle and nutrient molecules . The source converge and transition to the above earth bodily structure at the dirt level , mark by a unspecific flair or jacket crown at the base of the tree diagram trunk .

Above-Ground Structure

Emerging from the base system is the above - ground structure of the lemon tree : trunk , stems and twigs or rise tip . The trunk provides the main morphological support as well as vital vascular tissue paper to move the water and nutrient from the root upward and food such as starches and simoleons , and melodic line molecule downwards . Protected by barque , the trunk forks many times into branch or boughs until minor new growing twig terminate the structural system . The twigs bear occasional long sharp spine .

Foliage

Lemon tree leaves are tapering oval . The blanket blade of the leafage is held onto the tree sprig by a leafstalk or stalk . Leaves emerge from buds on untried twig . These leaves also are considered evergreen , persisting yr cycle , only dropping aside after two to four years and being replace with other new folio elsewhere in the Sir Herbert Beerbohm Tree , in the main on branch summit .

Flowers

Across outflow and early summertime , cluster of flower uprise just above the folio on the steer of branches bathed in sunlight . The flower buds are pale purple and white and open to reveal five white petals skirt a female person - gendered pistil and many pollen - carrying stamens .

Fruits

After the pollen reaches the pistil , the ovary becomes fertilized soon thereafter . The yield develops many fleshy , juice - filled compartment with seeds . At first , the yield ’s skin or rind is greenish like the leaves , but as a yield matures to about 3 to 4 inch in diameter , it slowly turn yellow . Fruits remain on the tree diagram until too heavy for the small stem before devolve off . Fruits ripen across previous summer and into the following winter .

References

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