AAPE+ is a mon-mon cross of Kilor APE x AA+ from Mycologene.
Here is a description written by Kilor Diamond:
This is a cross of AA+ and APE, two of my favorites! This came from my AA+ x APE project, where i have many crosses from varying parents. The cross fruits were leucistic with purple spores, but these F2 spores are albino. The fruits are solid, with long stipes resembling AA+ and a nice open cap that has tight gills and a thickness to it that resembles APE. They bruise a deep vivid blue. It's a perfect unity of the two classic varieties and a piece of work I'm particularly proud of.