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World of CitrusWorld of CitrusHudson Foster Grapefruit
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3638 (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 calls the cultivar Hudson: dark-red fruit appeared on post-freeze recovery growth of a Foster Seedless tree in 1930; it was not commercially developed because of seediness (p. 369). The catalog record's selection link to Foster Seedless makes this a source match, but this citation does not change that identity link.
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Robert E. Rouse, Heinz K. Wutscher, and Charles O. Youtsey · Subtropical Plant Science · 2001
Secondary historical account. Printed p. 3 compares Hudson at 40–60 seeds per fruit with Star Ruby at 0–9; it provides varietal reports, not a current sample or trial.
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Citrus ID · October 2011
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8594 (opens in a new tab)
The Hudson entry lists Hudson Foster as a synonym, cites multiple taxonomic treatments, and provides a general cultivar description. Its morphology is not identified as a measurement of UCR accession CRC 3638.
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Amy Deemer · Garden Guides · Updated November 3, 2022
https://www.gardenguides.com/126424-varieties-grapefruit-trees/ (opens in a new tab)
The Hudson Foster subsection describes fruit appearance, season, and tree growth in a general gardening profile. It does not identify a specimen or accession or provide measurement methods.
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Muhammad Awais Rana; Muhammad Usman; Bilquees Fatima; Arooge Fatima; Iqrar Ahmad Rana; Waqar Rehman; Dawood Shoukat · Pakistan Society for Horticultural Science; Journal of Horticultural Science and Technology · 2020; 3(2):31–35; DOI 10.46653/jhst20030231
https://www.pshsciences.org/publications/jhst/issues/3-2/2020-031/ (opens in a new tab)
This review cites Hudson (1930) and Ruben Pink (1963) as bud sports developed from Foster, referencing the 2004 grapefruit-origin account. It does not specify Foster Seedless or establish the relationship to the UCR Foster Pink accession.
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C. Chen; P. Cancalon; C. Haun; F. Gmitter Jr. · American Society for Horticultural Science; Journal of the American Society for Horticultural Science · 2011; 136(5):358–363; DOI 10.21273/JASHS.136.5.358
https://journals.ashs.org/view/journals/jashs/136/5/article-p358.xml (opens in a new tab)
The abstract reports Hudson fruit values for bergamottin (13.03 mg/L), 6,7-dihydroxybergamottin (9.58 mg/L), and paradisin C (6.11 mg/L) in a comparison of grapefruit cultivars. It does not specify a Hudson accession, collection site, harvest date, or analytical replication; no Brix or pH is reported.
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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)
The author gives a secondary account that Hudson was used in Hensz’s irradiation work leading to Star Ruby. This is a historical report, not primary verification, and does not resolve the differing origin accounts.
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