pulling them is one thing- digging them up is another thing entirely. the thing that makes perennials special is just that ability to grow from its rootball and crown every year.

it's entirely possible that it's a perennial weed (there are plenty of them) and getting rid of it won't upset anyone...but you'll need a spade or a garden fork to get below the root mass, so you can lift it.

round up is your only other option- best to use cardboard to protect the surrounding clover from the spray (use it set on 'foam' and it won't get everywhere)

I'll try the Round up approach first, if that doesn't work I guess I'll have no choice but to get on my knees and dig.

I wish you weren't a 4 hour drive away-I'd come take it all :)

actually, you might want to post on craigslist or freecycle.com offering 'u dig it' special on the rock cress- with the picture, I'm sure there are local people who would not only come dig it for you... they might even trade you for something YOU would like!

I traded 40 spiderworts (which approach weed-ish-ness in my garden) for 40 purple irises about a month ago...now THAT was a swap we both walked away from feeling like we'd both cheated the other person- though we could see they were thrilled with their new plants :)

I'll try and post a pic here if I can figure out how.