This is a very common plum in the area, probably because it grows well on it's own roots thus suckers freely everywhere. Locally it is known as 'Magnum Bonum'.
A vigourous grower with obvious weeping habit. Crops are prolific and this, in combination with the habit, can result in frequent branch breaking and the need for numerous props to limbs (as shown). Height is self-limiting at around 12 feet.