I had seen that gorgeous purslane in pics in 2016 or 7, but figured I'd never actually see one. I was shocked to see it (and the PRICE!) Had to have it anyway. I snipped all of the stems from the shady side and have about a dozen little starts in the ground, but I could use so many more to shade the ground around taller plants. It's going to take a few more yrs before I will have been able to get solid covers of perennials going. They're expensive & I like unusual ones, it's been slow going.
I also have commitment issues about using all of the space. Where would I impulsively stick new plants and "annuals" if there's no more empty space? It's part of the reason I have a problem with chamber bitters in particular, and another, taller Phyllanthus. Open spaces in full sun. Something as low-growing, pretty, and easy to pull should I want that spot for something else, and worthy of tossing bits into various savory dishes to boost nutritive value, as purslanes are the perfect solution.
Still can't get a definitive answer about using P. umbraticola culinarily, in addition to P. oleracea. Many pics of P. umbraticola "out there" label it P. oleracea. Because P. umbraticola was accidentally and incorrectly sold AS P. oleracea for a long time, I don't remember exactly but more than a decade, it's reasonable to assume that it would be well-known by now to "not eat the pretty ones" if there was a noticeable difference.
I've taken pics of most of my weeds at various times...
If you want something green growing on top of your landscape fabric, meet my least favorite garden resident lately. No, not my landscape fabric. This was @ my mom's house. Somehow this stuff ended up in my yard, I think from a load of leaves. She has too many, I have not enough.
Chamber Bitter (Phyllanthus urinaria)
I get sprouts of this, thorny berry vine that respects no known boundaries. Not difficult to pull when spotted early, but requires getting the stem @ soil level to avoid the thorns, even on a young plant with just a few leaves. Glad there's not any established in our mowed area like in this pic:
Dollarweed is so cute, but it never stops growing in a line, branching @ each node into infinity. I don't enjoy observing it (digging it up) in my yard, but it's beautiful to canoe through masses of it. An aquatic plant but determined, able to stay alive in what seems to me like an often very dry flower bed.
This vine usually only gets negative comments but it's a native, and really likes our CL fence, which was not busy doing anything else.
Peppervine (Nekemias arborea)
Betony. Early in the spring, it seems like it's going to take over the world, gotta dig it up, maybe just give up on gardening... but then on the first really warm day, it's suddenly gone. Poof. Hard to find the roots, but if you do, they're tasty, like a mild and slightly sweet radish. Gets a LOT of activity from bees, butterflies. I've come to really love it since it provides a lot of action when not much else is going on yet, then politely exits the stage for the late spring - summer show to get underway.
About the same time, chickweed (Stellaria media) and cleavers are doing their thing. They also disappear very quickly.
Cleavers (Galium aparine)
And then there's grass, bahiagrass, Bermuda, St. Augustine, torpedo grass, nutsedge, something that looks like a fern but has burrs, and others whose names aren't suitable for polite company. Our "lawn" has only these and various other plants that aren't "nice grass".
. People would stop and take photographs in my front yard there even though the patch of them was fairly small. But there are none at my current city house or on this rural property an hour away. But there are so manys other wildflowers I don't miss the 'Bonnets, although we DO love all things BLUE. 
