Texas Gardening: CAN YOU IDENTIFY THESE WEEDS FOR ME?, 4 by Gymgirl

Gymgirl wrote:
I'm trying to bring my yard back from the drought, and I need to identify these weeds. I'm new to lawn care, so any information on helping my St. Augustine grass spread again would be very helpful.

So far, I've been pulling out the weeds, and clearing the ground to make way for the St. Aug to spread. I spent Saturday morning ripping out some tall tufts of "Johnson" grass. So far, I've applied Scott's Turf Builder with Iron over the winter, right before our very few rains, to help build up the root system. Last month I applied a bit of fertilizer to give the lawn a boost. I've also applied Epsom Salts once or twice since December. I'm happy to report that the St. Aug is slowly spreading to the patches I've cleared up. The lawn is also greening up nicely. It still looks like a patchwork quilt, but it's better than all the dry brown patches from last summer.

But, with the onset of this heat, the undesirables seem to be picking up speed.

I'm not above using Roundup either, if it won't hurt or choke of the St. Aug grass. Please lemme know what I need to do with these weed, what they are, and what I can maybe spray on them without hurting/killing the St. Aug grass.

Much appreciated in advance. Here are the pics. I suspect pic #1 is milkweed, because I had a herd of Assassin Bugs take up residency in these last summer. They helped keep my bug population down to almost ZERO. Really. Which is why I didn't pull it out. Now, I've learned that it is an invasive, and it's spreading inward from the fence line. Surely don't want it all over!

Linda