
The "T-1" cherimoya came from Paul Thomson's Edgehill orchard in San Diego County. This was the famous orchard that the founder of the CRFG had where many varieties of cherimoya etc. were preserved.
It came into Santa Barbara during the early 1980's when the past (and now deceased) president of the Tri-Counties (now the Ventura/Santa Barbara) chapter of the CRFG, John Morales, went to Edgehill to take cuttings of what he felt were the best cherimoyas from his perspective. He selected for his own household two cherimoyas: 'Selma' the pink fleshed one which seems to have been the event that saved it from extinction since no one had ever taken cuttings of this before or since, and the 'T-1' which was his favorite white fleshed type that he found growing there.
The 'T-1' is an exceptionally sweet cherimoya with a wonderful flavor, very white flesh, and low seed count. On the other hand it will never be commercial as the skin is very thin and a favorite of mealy bugs as they seem to be able to penetrate to the sweet flesh. It also tends to be fairly protuberant on its surface which makes for bad shipping. But for home it's good. It tends to set easily without hand pollination.