Thanks for the welcome!
Here's the other two (sorry, the pictures are not as good - and the uploader seems to like rotating them upside down), they've been in the ground about a month and a half:
If I'd realized how rare they were (I have yet to see another one anywhere in town, and I've done some trekking...) I would have put more thought into how I was using them, instead I just stuck them in the middle of my experimental sedum patch. Thankfully it seems like they reproduce fairly quickly (?).