It recalls that the first Ruby Red grapefruit was discovered in 1929 growing on a pink grapefruit tree. The sweet taste of the Texas grapefruit is credited by Mike Martin of Rio Queen Citrus Inc. to the growing conditions...
Hagen RE, Dunlap WJ, Wender SH (1966) Seasonal variation of naringin and certain other flavanone glycosides in juice sacs of Texas Ruby Red grapefruit. J Food Sci 31:542–547Hagen, R. E.; Dunlap, W. J.; Wender, S. H. Seasonal variation of naringin and certain other flavanone ...