Turnera ulmifolia

Nos 1 and 2 are a Hypericum aka St John's Wort. I'm afraid I can't tell you which one. No 3 appears to be Tanacetum parthenium aka Feverfew

Since they are so tight to the ground, they're likely either Oxalis dillenii, or Oxalis corniculata in your area. If you dig a plant and it has a single stem, plus leaves and inflorescence from the root, dillenii is likely. But if stems are prostrate, and rooting from all nodes, then corniculata is indicated.

Carol provided the correct ID. You must have had rain, because the normal flowering period is June - August. Straggler Daisy is one of our smallest composites. It is most often found in Texas, growing in lawns and disturbed ground. The BONAP distribution map is available from this link.