Ujukitsu

Ujukitsu is a Japanese citrus known as ‘Sweet Lemon,’ a common name also used for other citrus. Gardening and home-fruit accounts describe broad pear-shaped yellow fruit with a neck and a thick peel that can be difficult to remove; UCR's accession notes also include round forms.^{⁠[5]⁠[12]⁠[1]}

Its documented history predates modern nursery stories: Shimizu et al. cite an 1882 report of long-standing cultivation in Wakayama, and UCR received seed from Shizuoka via W. P. Bitters in 1963. UCR lists the parents as unknown. A 2016 marker study offers competing pummelo-type × Kishu and Yuge hyoukan-based parentage hypotheses; the displayed pedigree and ancestry proportions represent one hypothesis, not a settled cross or measured genomic percentages.^⁠[2]⁠[1]

Fruit accounts vary by specimen. The UCR historical descriptions are seedy, while a recent Mulberries fruit was nearly seedless; its likely companion scorecard/video report 125 g, 11.5 °Bx and pH 3.5. A separate Taiwan-market fruit tasted by Scipio was reported at 11 °Bx. These are individual source readings, with sampling and instrument limits, rather than cultivar averages. Lemonade-like flavor and difficult peeling recur in the supplied home tastings.^{⁠[1]⁠[3]⁠[9]⁠[11]⁠[12]}

Ujukitsu is described as weeping, with long arching branches. Growers also report vigorous container roots or shoots on named rootstocks, but those reports concern particular plants. Texas freeze-survival accounts include protection and damage; they do not establish an unprotected cold limit for the cultivar.^{⁠[5]⁠[4]⁠[8]⁠[10]⁠[13]}