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World of CitrusWorld of CitrusFlame Grapefruit
Givaudan Citrus Variety Collection at UCR
https://citrusvariety.ucr.edu/crc3993 (opens in a new tab)
Accessed
J.V. da Graça, E.S. Louzada, and J.W. Sauls · Proceedings of the International Society of Citriculture · 2004
The paper reports Flame as a Henderson seedling found in Florida in 1983 and released in 1987 (pp. 369, 371). Its seedling wording does not establish embryo origin and therefore does not resolve the catalog's more specific nucellar-selection metadata. The article cites differing comparative lycopene results from earlier studies.
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Graham H. Barry et al. · The Genus Citrus (ScienceDirect Topics excerpt) · 2020
The chapter describes Flame as developed from Henderson seedlings in Florida and released by USDA in 1987. This is a retrospective history account, not a new field or fruit trial.
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James N. Cummins, editor; grapefruit section by F. G. Gmitter Jr. and K. M. Crosby · HortScience / American Society for Horticultural Science · 1995-10
The Flame entry reports a Henderson seedling found in 1973 at A.H. Whitmore Foundation Farm, selected by C.J. Hearn in 1980, and introduced by USDA in 1987. It describes globose, seedless fruit with red flesh darker than Ray Ruby but lighter than Star Ruby, and a tree similar to Henderson. This is the register’s attributed account and does not resolve other origin reports.
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Citrus ID
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8549 (opens in a new tab)
Citrus ID Edition 2 (October 2011) entry; the cited Chiefland Budwood Facility 2010 report says Flame seedlings were planted in Florida from Henderson material originating in Texas and that USDA released Flame in 1987. The entry describes a compact, dense, nonweeping crown and fruit with slightly rough, leathery yellow to yellow-orange rind and red to purplish flesh; fruit may be as broad as long or longer. Chiefland’s note says rind/blush resembles Star Ruby and flesh color holds well into the season. This profile does not identify the separate unnamed HLB-tolerant Flame bud sport.
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The Hale Groves Team · Hale Groves · 2014-03-16
The Hale Groves Team describes Flame as having redder flesh and a pinker rind blush than Ruby Red, and attributes Flame to Ruby Red progeny through nucellar embryony. Flame’s cataloged immediate relationship is to Henderson; Henderson itself is recorded as a Ruby Red bud sport, so the broader ancestry may be compatible. This commercial account does not identify Flame’s immediate parent or establish the lineage details, and it is not a comparative trial.
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Manjul Dutt, Sheetal Ramekar, and Gary England · Citrus Industry · 2024-11-19
This article describes an unnamed bud sport discovered in ordinary Flame grapefruit in Lake County, Florida, and attributes the report to Manjul Dutt, Sheetal Ramekar, and Gary England. It concerns a distinct derivative selection; its reported HLB tolerance, canopy, leaf, and maturity observations are not ordinary Flame traits and are not asserted here.
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brian · Tropical Fruit Forum · 2020-02-08
https://www.tropicalfruitforum.com/index.php?topic=36134.0 (opens in a new tab)
Summary from brian’s post: his first Flame fruit came from a tree kept in a container, then planted in a heated Pennsylvania greenhouse after a scale infestation. He reports one accidentally detached fruit as juicy with nice internal color and less sweet than grocery-store Ruby grapefruit, and is unsure whether heat or variety explains it. No rootstock or measurements are reported; replies about other grapefruit are not Flame observations.
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Growing Fruit Forum · 2016-11-07
https://growingfruit.org/t/flame-grapefruit-tree-anyone-have-one/7735 (opens in a new tab)
Summary from the thread: mattk reports a Flame in a 15-gallon container, one fruit in 2015 and two set in 2016, and guesses February maturity for the pictured fruit. desertgardengirl reports a separate in-ground Arizona tree, usually ready in early January and sometimes held to March or April. jeremymillrood describes a young in-ground tree doing well; MuddyMess_8a reports two fruit that fell from the tree, one with a slight pink blush. These are distinct grower accounts; no post identifies the Flame rootstock, and mattk’s later sweetness comment refers to the same fruit.
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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); DOI 10.1007/s10577-006-1101-2. The PubMed abstract reports sequential CMA/DAPI staining and rDNA-FISH for six grapefruit, two pummelos and one tangelo. It places Flame Grapefruit in the group reported to have three CMA-positive C-type and five D-type chromosomes, with five reported 45S rDNA sites. Two chromosomes carried 5S rDNA across the accessions. Full text was not available in the inspected publisher view. These marker patterns are not a ploidy determination, full chromosome count, shared cultivar identity or proof of this cultivar's parentage.
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