Knowra Citrus Citrus Citrus is a genus of flowering trees and shrubs in the rue family, Rutaceae. Its species and hybrids bear distinctive fruits such as oranges, lemons, and limes.
Hesperidium : A modified berry with a leathery rind and juicy, segmented interior, characteristic of citrus fruits. This specialized fruit structure distinguishes citrus fruits from ordinary berries.
Citrus cultivation : The agricultural growing of citrus trees for fruit, juice, and other products. Orchard practices determine yield, fruit quality, and exposure to pests.
Citrus domestication : The long process by which people selected, propagated, and spread cultivated citrus plants. Human cultivation reshaped the genus and moved its fruits far beyond their native range.
Poncirus : A genus of thorny deciduous plants in Rutaceae, closely related to citrus and formerly included within it. Its placement shows how taxonomic boundaries around Citrus have shifted.
Rutaceae : The flowering-plant family that includes citrus, rue, and several aromatic trees and shrubs. Citrus belongs to this family, whose oils and glands also characterize its relatives.
Citrus rootstock : A citrus plant onto which a fruit-bearing scion is grafted, influencing vigor and stress tolerance. Rootstocks let growers combine desirable fruit with locally suited roots.
Citrus evolution : The evolutionary history of citrus lineages, including divergence and extensive natural hybridization. Ancient lineage splits underpin the ancestry of many modern citrus varieties.
Kumquat : A group of small, edible, thin-skinned fruits traditionally classified in the genus Fortunella. Kumquats resemble citrus fruits but have often been classified outside Citrus.
Citrus taxonomy : The classification of citrus plants, complicated by hybridization, polyploidy, and long cultivation histories. Species boundaries in the genus remain difficult to separate from cultivated hybrids.
Citrus production : The global farming and processing of citrus fruit, including oranges, lemons, and mandarins. Commercial production makes citrus one of the world’s most widely grown fruit groups.
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