Brown reports Temple Tangor as the seed parent and Poncirus trifoliata as the pollen parent for the Houston hybrid; the trifoliate pollen had been exposed to 1,200 roentgens of X-radiation. The article associates this material with the later Citemple 'Edible' name but gives no accession or propagation chain.
Source [1]: https://www.scribd.com/document/138537543/Hardy-Citrus-of-Texas
World of Citrus