FWIW, I don't really follow Steve Tyree so couldn't tell you if it is a "tyree" purple monster. As far as lineage, this frag was from a colony I personally collected in the Solomon Islands a few years ago when I was there setting up a coral farm. It had been in my greenhouse since then, about a year ago the colony started to die off for some unexplainable reason and so I saved a bunch of frags and now on occasion I cut a frag from one of those frags. I believe the coral they call purple monster originally came from the Solomons. This is a fairly common Acro there, some are more purple than others. This one is not very bright purple, but in the greenhouse it is normal for corals to change in intensity as the seasons change so at time they are more colorful than other times. The same coral under T-5 fluorescents becomes more colorful with low nutrient levels. Hope this info helps.