Yuzuquat

J. Stewart Nagle’s 1993 account attributes a late-1960s Nameiwa (Nagami × Meiwa) × Yuzu cross to William B. Chapman. Nagle reports that Dr. John R. Brown later kept the original tree, which was grafted onto trifoliate orange, and that Hines Nursery adopted the name Yuzuquat after “Jejune Lemon” was considered. The account does not identify the Nameiwa selection, cross direction or parent accessions, and no reviewed source establishes that later forum plants or tasted fruit descend from that tree.^⁠[1]

Nagle describes broad, pale-yellow, pear-shaped fruit with edible aromatic peel, sour flesh and seeds, while noting that flavor and juiciness varied between years. He also reports a tall, narrow, productive tree and survival through severe freezes, but gives no precise freeze minimum or protection details.^⁠[1]

Later reports describe different plants and individual fruit samples. In the Tropical Fruit Forum, one grower says a Yuzuquat seedling first fruited with one fruit in 2021; a recipient of that grower’s cutting reported that it bloomed in Portland in 2024 but gave no fruit result. Other growers describe sour fruit and thorny growth, while a North Vancouver grower lists Yuzuquat among citrus doing best under poly without assigning the group’s pot, ground or repeat-bloom details to it. Two video tastings describe lemon- or Yuzu-like fruit under different sample conditions, and the specific kumquat parent or connection to Chapman’s historical tree remains unconfirmed. The Mulberries’ scorecard accompanies its video tasting and is not a second sample.^{⁠[3]⁠[4]⁠[5]⁠[9]⁠[6]⁠[8]⁠[7]}