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World of CitrusWorld of CitrusIchang Papeda
Givaudan Citrus Variety Collection at UCR
https://citrusvariety.ucr.edu/crc2431 (opens in a new tab)
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SoCal2warm · Tropical Fruit Forum · Cold Hardy Citrus · April 28th, 2022
https://www.tropicalfruitforum.com/index.php?topic=43392.msg458879#msg458879 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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SoCal2warm · Tropical Fruit Forum · Cold Hardy Citrus · September 5th, 2024
https://www.tropicalfruitforum.com/index.php?topic=56301.msg533972#msg533972 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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SoCal2warm · Tropical Fruit Forum · Cold Hardy Citrus · September 5th, 2024
https://www.tropicalfruitforum.com/index.php?topic=56301.msg533982#msg533982 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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Citrus Genome Database
https://www.citrusgenomedb.org/Analysis/2530643 (opens in a new tab)
Genome resource reviewed against the CGD assembly record and existing variety identity. ZGYCC is a sequenced Citrus ichangensis accession. It provides a species reference for Ichang papeda; the app’s general record is not verified as that accession.
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The Mulberries · YouTube · 2024-12-07
https://www.youtube.com/watch?v=CCnLabiS4MU (opens in a new tab)
Summary from transcript: The speaker calls the field Ichang Papeda reliably surviving locally and describes little or no juice, ornamental value, and possible peel or pith use (13:23–13:49).
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Tokurou Shimizu et al. · PLOS ONE · 2016-11-30
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0166969 (opens in a new tab)
Open-access DNA-marker study (CC BY 4.0). Apply only to the study accessions and preserve the authors’ stated identity and parentage limits; it does not by itself establish the identity of every catalog tree or clone bearing a matching cultivar name.
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SoCal2warm · UBC Botanical Garden Forums · 2025-04-23
Same post reports that two small Ichang papeda plants did not survive outdoors at the author's Olympia site. This is a separate taxon and anecdotal observation, not evidence about Ichang Lemon.
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The Mulberries
Companion taste scorecard labeled Ichang Papeda. Printed sweetness/sourness/bitterness ratings are 2/2/4; under the owner-directed catalog conversion, scores are 2/8/6 (sweetness unchanged; sourness and bitterness are 10 minus printed ratings). This source establishes the printed preference ratings only; other scorecard fields are not transcribed as measurements.
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SoCal2warm · Tropical Fruit Forum · September 28, 2019
https://www.tropicalfruitforum.com/index.php?topic=33633.msg366518#msg366518 (opens in a new tab)
SoCal2warm recounts an April 2019 conversation with Nat Bradford about outdoor Taiwanica and C. ichangensis plants. The report says the C. ichangensis lost leaves that turned yellow-brown each winter and had not flowered over a stated seven-year period. The nearby reported 4°F low is not assigned to C. ichangensis here because applicability is ambiguous.
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Skandiberg · Tropical Fruit Forum · Cold Hardy Citrus · 2026-06-24
https://www.tropicalfruitforum.com/index.php?msg=584351 (opens in a new tab)
Post #141 reports one Ichang seedling with a fully trifoliate leaf. The poster notes that a single leaf may be a rogue occurrence and does not establish repeated growth or hybrid parentage. This is an individual seedling observation, not a description of typical Ichang Papeda foliage.
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University of California, Riverside Citrus Variety Collection
https://citrusvariety.ucr.edu/crc2327 (opens in a new tab)
UCR accession profile for CRC 2327 / PI 539251. It identifies this as true Citrus ichangensis, reports receipt as a live plant from CPB in 1930, and records shoot-tip grafting in 1986 as sanitation history. This citation concerns CRC 2327, a separate accession from CRC 2431 and CRC 3931; it does not provide a quantitative fruit-pulp or juice measurement.
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citrange (reply #4593) · Citrus Growers Forum · 2020-10-23
https://citrusgrowersv2.proboards.com/thread/643/citrus-ichangensis-sra241 (opens in a new tab)
Reply #4593 explicitly distinguishes the writer's Ventnor Botanic Garden, Isle of Wight plant from the SRA241 plant under discussion. It describes one fruit from that different form as oval, dusky green-yellow, with stringy pith, embedded seeds, and no flesh to taste. This is a source citation for the separate reported form only, not for SRA241 or CRC 3931; the cold-minimum statement is not assigned as a controlled threshold or to the base accession.
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SoCal2warm · University of British Columbia Botanical Garden Forums · 2020-10-07
https://forums.botanicalgarden.ubc.ca/threads/ichang-papeda-taste-flavor.99195/ (opens in a new tab)
Forum report about an unaccessioned Ichang papeda tree at Hoyt Arboretum in Portland, described by the poster as about 6 ft tall. The poster said the fruit might be underripe and graft status was uncertain; small inner segments were described as not very juicy but edible. The same tree/report is also described in Permies post 1212465; these are not independent specimens. A Jan. 9, 2021 reply identifies Nov. 5 as the date of later-season photographs, not the tasting date. No accession identity or general cultivar threshold is established.
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Permies · 2021-01-23
https://permies.com/t/40/74712/Hybridizing-cold-hardy-citrus-grow (opens in a new tab)
Page 2, post 1212465 (January 23, 2021; retired account with blank author display) reports fruit picked November 5, 2020 from an unidentified Ichang papeda tree at Hoyt Arboretum, Portland. The writer describes small, not-very-juicy segments that were edible, and says the fruit might not have been fully ripe; graft status was uncertain. This substantially duplicates SoCal2warm's UBC forum account of the same tree/report, not an independent specimen. No CRC accession, typical fruit measurement, or cultivar-wide juice/seed claim is established.
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Walter T. Swingle · USDA, Journal of Agricultural Research · 1913-10-10
https://books.google.ca/books?id=26w7AQAAMAAJ&pg=PA1&output=html_text (opens in a new tab)
Swingle’s original description, reviewed from printed pages 1–14 and Plate I; the next paper begins on page 15. Pages 1–14 and figures 1–7 were examined. This is a historical account of Chinese specimens and reported forms, not an identity bridge to modern CRC 3931, CRC 2431, SRA241, or IVIA 358 accessions. The separately discussed provisional latipes taxon from the Khasi Hills is not treated as Ichangensis evidence.
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The Mulberries · YouTube · 2026-03-27
https://www.youtube.com/watch?v=spj-xs5_nPI (opens in a new tab)
Summary from transcript: The presenter describes a particular, unaccessioned Ichang papeda strain, characterizing its fruit as round and yuzu-shaped with more juice than typical papeda. He explicitly says he has not yet reviewed fruit from this specific strain, so this is not a tasting or measured juice result. The featured plant is reported flowering after grafting; its accession, named rootstock, and location are not identified. The presenter’s hardiness and breeding comments are unmeasured assertions, not a cold-exposure result or verified parentage. It is not identified as CRC 2431, CRC 3931, SRA241, IVIA-358, or IVIA-235.
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The Mulberries · YouTube · 2026-07-31
https://www.youtube.com/watch?v=Wk-Isi3B-mg (opens in a new tab)
Summary from transcript: The presenter locates his garden in Central North Carolina, zone 8A, and reports that its Ichang papeda plants remained evergreen through a winter reaching 10°F, with some leaf loss; the exact winter date, duration, plant identity, rootstock, and protection are not specified. He gives general 0–5°F expectations depending on freeze duration, not a measured exposure or survival threshold for an identified accession. He describes pinkish-white flowers, red buds and new growth, and one unnamed strain that did not set fruit that season; its round, Yuzu-like fruit and flavor are secondhand reports, not his tasting. The video also discusses named hybrids, speculative breeding, and other citrus, which are not evidence for CRC 2431, CRC 3931, SRA241, IVIA-358, or IVIA-235.
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The Mulberries · YouTube · 2024-11-09
https://www.youtube.com/watch?v=sA58Sc2q6-Q (opens in a new tab)
Summary from transcript: The presenter reviews fruit from an unidentified nearby specimen tree, picked up from the ground. He says Ichang papeda varies and compares the fruit visually with UCR collection photos but does not identify an accession. This sample is described as having little flesh and effectively no juice; the presenter also discusses resinous rind and woody, pine-like, vaguely lemony zest. These are subjective, sample-specific descriptions. A separate juicier strain from Oregon or Washington is mentioned but not identified. The presenter says the video's original overall score was 22, matching an archived Ichang Papeda scorecard total of 22, but the fruit-to-card relationship and sampling date are unverified; do not treat this as an independent evaluation or change the existing card. No accession, rootstock, exact location, harvest date, or repeatable method is established.
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Le Pepin Breizh · YouTube · 2026-04-11
https://www.youtube.com/watch?v=P6qI2YfstKM (opens in a new tab)
Summary from transcript: The speaker presents a tree he calls “my Ichang Papeda IVIA,” without a selection number; this does not identify it as IVIA-358 or IVIA-235. He describes large shoots, leaves, and flower buds. On April 10, 2026, he says it is expected to be planted outdoors in a few weeks, but a later caption says “It’s planted”; the video description also says the tree is still in a greenhouse, so planting status is unresolved. He says it is grafted on Poncirus, without identifying the rootstock clone or graft age. The location is unstated, and the video documents no cold exposure, injury, survival, fruit, or evaluation.
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Slice Of Tropics · YouTube · 2026-03-01
https://www.youtube.com/watch?v=Eu63bxLajj8 (opens in a new tab)
Summary from transcript: The video tastes fruit sent by “Ilia.” Automatic captions render one early reference as “I 358” and later call a fruit “Evia”; a nearby readable label checked for the video says “Ich. Star 50.” These names and sample references are ambiguous and do not establish IVIA-358 or another accession. The sender’s provenance, harvest date, storage, and mapping between the fruit and visible label are not documented. The speaker gives subjective taste descriptions but no numeric taste scores, weight, Brix, pH, or cold-exposure report. This is a qualified, unassigned papeda-fruit report, not evidence for CRC 2431, CRC 3931, SRA241, IVIA-358, or IVIA-235.
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alan · Hardy Citrus · January 13, 2014
https://hardycitrus.blogspot.com/2014/01/cold-hardiness-table_13.html (opens in a new tab)
In the March 27, 2017 update, the author says Yuzu was hardier than Ichang papeda and that Ichang had stem dieback and lower vigor. This is the author's qualitative comparison; no varieties' accessions, individual exposure temperatures, duration, or replicate counts are supplied. The page warns that observations are based on small numbers and limited cultural conditions, so this does not establish a temperature threshold.
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till · Citrus Growers v2 · Hybridizing citrus forum · December 4, 2022
https://citrusgrowersv2.proboards.com/post/7296 (opens in a new tab)
Post #7296 reports C. ichangensis pollen used on Calamondin, with few flowers, fruits, and seeds. This same cross is cited separately on the Calamondin catalog entry; the poster reports no controlled pollen-donor comparison or genetic confirmation of offspring. Supplied thread captures cover pages 1–2 of 3.
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till · Citrus Growers v2 · Hybridizing citrus forum · December 7–12, 2022
https://citrusgrowersv2.proboards.com/post/7300 (opens in a new tab)
Till's first-person qualitative fruit reports in posts #7300 and #7306 describe a very bitter peel with a peppery note, very sour pulp, and relatively few seeds. The author speculates that seed scarcity may reflect cross-pollination; no fruit count, accession, tasting protocol, or causal test is reported. Post #7305 repeats the taste description and is not independent. Supplied thread captures cover pages 1–2 of 3.
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imgrimmer · Homegrown Goodness / ProBoards
Reviewed from the five-page user-supplied HTML capture. This citation covers imgrimmer’s May 25, 2017 post #122310 on page 3 and related posts #122782, #122787, and #123312 on page 4. Seedling cross labels are grower reports, not genetically verified pedigrees; paclobutrazol’s role in flowering is uncertain; the reciprocal C. keraji pollination outcome was unknown.
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