Sources

Hall grapefruit X Rubidoux citrumelo trifoliate hybrid (opens in a new tab)

University of California, Riverside — Citrus Variety Collection

https://citrusvariety.ucr.edu/crc3889 (opens in a new tab)

Accessed September 18th

C-190 (opens in a new tab)

Citrus ID, IDtools

https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8325 (opens in a new tab)

Citrus ID Edition 2 profile; its footer identifies October 2011, which is edition information rather than an observation date. The page describes the crown as compact or dense and not weeping; fruit as broader than long with green-yellow, yellow, or yellow-orange, slightly rough, leathery rind, no navel, yellow flesh, and sour taste. It lists taxonomic treatments citing Bayer et al. (2009), Cottin (2002), and Swingle and Reece (1967), without mapping individual traits to a particular reference. The Origin heading has no accompanying text. The resource link points to UCR's Hall Rubidoux page. No accession-specific observations, sample count, or measurement method is given.

Accessed October 2nd