John Brown has bred many citrus hybrids of greater or lesser frost resistance. Information about most of them came to us from the article C. T. Kennedy, John R. Brown - The Hardy Citrus of Texas (1992), written by C. T. Kennedy based on notes by Dr. Brown. Most of these hybrids have been lost, but some have remained and are being preserved by amateur and professional citrus breeders such as Gaylord Ventura, Stan McKenzie, Hershell Boyd and others. Below is a list of hybrids obtained by John Brown based on data from articles and information from the Internet (forums, blogs).
Citempl's (“Edible”, “Citemsweet” (Citempl “Sweet”), “Citbeau” (Citemple “Beautiful”)),
Citbeau × Bloomsweet,
YuSanfordtrange (Yuzu × Sanford citrange),
Valencia by Chapman (YuSanfordtrange × Satsuma monoembrionic),
SMYSF (Satsuma monoembrionic × YuSanfordtrange),
CEI's (CiTemple “Edible” × C. ichangensis) (CEI #1),
CEI #1 × “Tomasville” citrangequat,
CEI #1 × CEMorton,
CEI #1 × Clemichangensis,
CEI #1 × Morton
CEI #1 × Clementine,
CEI #1 × Ujikitsu,
“Sanford F2” citrumelo (open pollination of “Sanford” citrange, probably with C. paradisi or C. maxima),
SanCitBloomsweet's (“Sanford” citrumelo × Bloomsweet) (#9),
Ciclem's (
'Dimicelli', 'Backyard', 'Hardy Fruitful '90', 'Ciclemsweet', CiClem #10),
CiMineola (C. trifoliata × tangelo “Mineola”),
NaMeiwa's (Nagami × Meiwa) (#1),
NaMeiwa's #1 × Glen,
Nagami × F. hindsii,
Meyerquat, (?)
NameiMQ (Nameiwa × Meyerquat),
NagamiMQ (Nagami × Meyerquat),
Clementine × Tomasville,
Nagami × Tomasville,
CiChinotto's (Chinotto × trifoliata) (“Large-leaf”),
ChangshaYuzu (#1, #2),
ChangshaGlen,
SanCitChang (#1, #2, #3, #5, #9),
Changsha × Ichangensis,
Seedles Kumquat (Meiwa × Nagami),
OP. Nagami,
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Yuzuquat
Yuzvange
Ten-Degree Kumquat
(Poncirus × Yuzu) × Clementine
Citrumelo × Changsha
Changsha × Clementine
(Citrumelo × Changsha) × Clementine
Changsha x Yuzu (broadleaf),
Sancitchang #3,
(Poncirus x Yuzu) x Clem,
Changsha x Yuzu (willowleaf),
Ichang x Clementine,
Clementine x morton citrange,
(Ichang x Clementine) x Clementine.