Editing Citron (section)

=== Fruit ===
The citron fruit is usually [[Glossary of leaf morphology#ovate|ovate]] or oblong, narrowing towards the [[Etrog#Pitom|stylar]] end. However, the citron's fruit shape is highly variable, due to the large quantity of [[Mesocarp#Mesocarp|albedo]], which forms independently according to the fruits' position on the tree, twig orientation, and many other factors. The rind is leathery, furrowed, and adherent. The inner portion is thick, white and hard; the outer is uniformly thin and very fragrant. The pulp is usually acidic, but also can be sweet, and some varieties are entirely pulpless.

Most citron varieties contain a large number of [[monoembryonic]] seeds. The seeds are white with dark inner coats and red-purplish [[chalazal spot]]s for the acidic varieties, and colorless for the sweet ones. Some citron varieties have persistent [[carpel|styles]] which do not fall off after fecundation. Those are usually preferred for ritual ''[[etrog]]'' use in [[Judaism]].

Some citrons have medium-sized oil bubbles at the outer surface, medially distant to each other. Some varieties are ribbed and faintly warted on the outer surface. A fingered citron variety is commonly called [[Buddha's hand]].

The color varies from green, when unripe, to a yellow-orange when overripe. The citron does not fall off the tree and can reach 8–10 pounds (4–5&nbsp;kg) if not picked before fully mature.<ref>''Un curieux Cedrat marocain'', Chapot 1950.</ref><ref name="HortScience 2005">[http://grande.nal.usda.gov/ibids/index.php?mode2=detail&origin=ibids_references&therow=796030 The Search for the Authentic Citron: Historic and Genetic Analysis; ''HortScience'' '''40'''(7):1963–1968. 2005] {{webarchive |url=https://web.archive.org/web/20080921214001/http://grande.nal.usda.gov/ibids/index.php?mode2=detail&origin=ibids_references&therow=796030 |date=September 21, 2008 }}</ref> However, they should be picked before the winter, as the branches might bend or break to the ground, and may cause numerous fungal diseases for the tree.

Despite the wide variety of forms taken on by the fruit, citrons are all closely related genetically, representing a single species.<ref name="Talon" /><ref name="Ramadugu">{{cite journal | last1=Ramadugu | first1=Chandrika | last2=Keremane | first2=Manjunath L | last3=Hu | first3=Xulan | last4=Karp | first4=David | last5=Frederici | first5=Claire T | last6=Kahn | first6=Tracy | last7=Roose | first7=Mikeal L | last8=Lee | first8=Richard F. | title=Genetic analysis of citron (''Citrus medica'' L.) using simple sequence repeats and single nucleotide polymorphisms | journal=Scientia Horticulturae | volume=195 | pages=124–137 | year=2015 | doi=10.1016/j.scienta.2015.09.004 | doi-access=free | bibcode=2015ScHor.195..124R }}</ref> Genetic analysis divides the known cultivars into three clusters: a Mediterranean cluster thought to have originated in India, and two clusters predominantly found in China, one representing the fingered citrons, and another consisting of non-fingered varieties.<ref name="Ramadugu" />