Ruby The red-fleshed variety originated as a bud sport from the Thompson.  It was found by Albert E. Henninger of McAllen Texas in 1929.  The original tree was obtained by him in 1926.  In the 1929 Thompson crop Mr. Henninger noticed a fruit with a crimson flush on the rind and colored flesh. Buds from the sport branch were propagated and produced fruit like that of the branch.  The variety was patented by Mr. Henninger in 1934, and is thought to have been the first citrus fruit patented.