That's queer. We have a Tree of Heaven slap bang in the middle of the lawns at Lard Hall, been there a good twenty years, that some itinerant tree surgeons came and operated on last week. It doesn't pong at all, nor send out suckers, but the leaves and twigs match Bill's site description.

I was all for turning it into Weston Whistles , but Mrs S insists it's a lovely tree and it's staying right where it is.

I'll keep an eye on it now.