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World of CitrusWorld of CitrusHenderson Grapefruit
J.V. da Graça, E.S. Louzada, and J.W. Sauls · Proceedings of the International Society of Citriculture · 2004
The paper reports a dark-red-fruited limb found in 1973 on an “Everhard strain of red grapefruit,” later named Henderson, while documenting competing origin accounts: Ruby Red bud sport vs. Everhard/Fawcett interpretations (p. 369). It does not resolve the lineage dispute.
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Graham H. Barry et al. · The Genus Citrus (ScienceDirect Topics excerpt) · 2020
The chapter gives a 1973 Texas origin as a limb sport of Fawcett, itself described as a Thompson limb sport. This is one historical account among competing origin reports; it does not resolve the conflicting lineage.
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Citrus ID
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8583 (opens in a new tab)
Citrus ID Edition 2, October 2011; entry headed Henderson. Lists Henderson Ruby and Henderson’s Red (the latter attributed to Cottin 2002). The entry cites alternate taxonomic treatments, which are attributed classifications and not evidence resolving Henderson’s parentage. Its photos are captioned as Riverside, California material; the entry gives no trial design or accession-specific measurement.
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Julian W. Sauls · Subtropical Plant Science · 1998
https://www.subplantsci.org/wp-content/uploads/2016/02/SPSJ-50-15-19-Sauls.pdf (opens in a new tab)
Subtropical Plant Science 50:15–19 (1998), Texas Agricultural Extension Service, Weslaco. Compares Henderson and Rio Red fruit shape by equatorial-to-polar diameter ratio during January–March 1998 in separate seven-year orchards near Santa Rosa, Texas. The paper reports fruit counts in shared size bins; those counts are not cultivar-specific. This is a size-stratified shape study, not a general fruit-quality or taste assessment.
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Mani Skaria, Ph.D. · US Citrus · 2020-12-02
https://uscitrus.com/blogs/citrus-delight-blog/the-texas-grapefruit-story (opens in a new tab)
Commercial retrospective article dated December 2, 2020. In a grapefruit-history passage, the author states that Ray Ruby is identical to Henderson and describes Henderson as a Ruby Red limb sport discovered in 1973. This is an attributed account that conflicts with other Henderson origin and cultivar-identity accounts; it does not authenticate a Ray Ruby accession or resolve Henderson’s parentage.
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Turgut Yeşiloğlu; Bilge Yılmaz; Berken Çimen; Meral İncesu · Turkish Journal of Agricultural and Natural Sciences · 2014
https://dergipark.org.tr/tr/download/article-file/142266 (opens in a new tab)
Special Issue 1 (2014), pp. 1322–1325. Reports a 2013 Henderson-scion rootstock comparison at Çukurova University Citrus Experiment Station, Adana, Türkiye, on local sour orange (Yerli), Carrizo, Troyer, Swingle and Volkameriana. Trees planted in 1997; six replicates per combination; random samples of 25 fruit per tree at optimum harvest in late November or early December. Trial-specific measurements and chemistry; TSS and titratable acidity are not taste-intensity scores.
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Ana Paula de Moraes; Walter dos Santos Soares Filho; Marcelo Guerra · Springer · 2007
https://pubmed.ncbi.nlm.nih.gov/17295131/ (opens in a new tab)
Chromosome Research 15(1), 115–121 (2007), published online 12 February 2007; DOI 10.1007/s10577-006-1101-2. The abstract reports CMA/DAPI staining and rDNA-FISH karyotype analyses of six grapefruit, two pummelo and one tangelo cultivar. It places Henderson with Flame, Marsh and Rio Red in a reported marker-pattern group and distinguishes Duncan and Foster. Full text was not available in the inspected publisher view. These marker patterns are not a ploidy determination, full chromosome count, or proof of shared cultivar identity or Henderson parentage.
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Berken Çimen; Meral İncesu; Turgut Yeşiloğlu; Bilge Yılmaz · Turkish Journal of Agriculture - Food Science and Technology · 2014-02-10
https://doi.org/10.24925/turjaf.v2i1.38-41.76 (opens in a new tab)
2(1) (2014), pp. 38–41. Publisher-hosted article reached from the supplied AGRIS record 675981a7c7a957febdf99d7f. Henderson observations concern collection trees planted in 1984 at Çukurova University’s Tuzcu citrus collection. The article reports 2011/2012 yields and separate January 2012 fruit measurements using three replicates and ten fruits per replicate for weight. This is distinct from the separate five-rootstock Henderson scion trial.
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Robert E. Rouse; Heinz K. Wutscher; Charles O. Youtsey · Subtropical Plant Science · 2001
Subtropical Plant Science 53 (2001), pp. 1–3. Henderson account at pp. 1–2 (PDF pp. 2–3), lines 107–144. The authors retrospectively recount the Henderson orchard history, including a 1973 report of a limb with stronger red blush and deeper flesh color, W. V. Ausmus’s propagation rights, and subsequent evaluation and budwood testing. They describe the one-third canopy mutation as apparently associated with the 1951 freeze; the account does not establish cause or reconcile other origin accounts.
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University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3914 (opens in a new tab)
The CRC 3914 profile identifies Henderson Ruby grapefruit as PI 539483 / VI 465 and records that UCR received budwood from Julian W. Sauls of the Texas Agricultural Extension Service at Weslaco, Texas, in 1985. This supports the documented receipt and source of the budwood, not separate claims of maintenance or individual collection activity.
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