March 5, 2026
Spill the citrus tea
A ternary plot of citrus geneology
Citrus family drama: Persian lime plot twist, Etrog missing, and fans begging for a search button
TLDR: A triangle chart shows most citrus fruits are hybrids of pomelo, mandarin, and citron, with surprises like Persian lime’s lemon–Key lime roots. Comments erupted over missing Etrog, broken search results, and feature requests, turning a nerdy chart into a lively debate about fruit family drama and usability.
Today’s fruity chart bomb drops a wild truth: most of our market darlings—orange, lemon, grapefruit, clementine—are hybrid mashups of three OG ancestors: pomelo, mandarin, and citron. A slick triangle map lets you click each fruit to see how much of each ancestor it’s got. Cue the Persian lime plot twist: commenters gasped that it’s a lemon–Key lime lovechild and started cracking “paternity test for lemons” jokes. Others swooned over the sweet march toward mandarin-rich varieties, dreaming up taste-test flights like it’s a craft beer menu.
But the real juice is the search drama. One camp begged for a “type the fruit, find the dot” button, while the accuracy police rolled in: “Where’s the Etrog?” demanded one user, dropping a Wikipedia link like a mic. They also called out the “click to show search results” feature for bailing on “Arizona Citron.” Meanwhile, history nerds cheered the reveal that it’s not a timeline at all—just clusters of bitter-versus-sweet preferences over centuries of trade and breeding, with bonus chaos from samuyao sneaking into limes. The vibe: delightful science meets UI beef, with everyone ready to raid the produce aisle after class.
Key Points
- •Most modern citrus varieties are hybrids of three ancestral species: pomelo, mandarin, and citron.
- •A ternary plot is used to represent each citrus by its proportional genetic contributions from the three ancestors.
- •Ancestral citrus species diverged over five million years ago, likely due to a climatic event triggering evolutionary radiation.
- •Historical domestication in Asia and spread into the Mediterranean led to selection and crossing, forming market recombination clusters.
- •Additional ancestry from samuyao (Citrus micrantha) via key lime and Persian lime complicates the ternary representation.