hello all i am new to this so hope im getting in right place. i have a plum tree in yard and it seems no one can tell me what type of plum it is. info harvest September in lehi Utah. the plum are a reddish skin and yellowish meet. they are really sweet and tart. the seed in them are hard to get out not like some plums or peaches and apricots its meat attaches to it. any ideas on what i could be i know it a shot in the dark but cant place pictures till September.