The first one could be Symphyotrichum pilosum (Frost Aster). A few of those are still blooming in south-central Arkansas.

Common name is from its affinity for the shade of "cedar" trees. It's a good shade/understory plant. Ours is growing under a dwarf peach. The following NPSOT article provides more background. Here is a link that might be useful: Cedar sage article by NPSOT This post was edited by bostedo on Sun, Mar 31, 13 at 0:35

Only because I looked through a catalog recently and recognized the leaf, but the yellow is Oxalis Bermuda-Buttercup? Here is a link that might be useful: Propagating Perennials

Descriptions say it is xeric but it has only appeared when we have had a gentle year. I can't say it is wet since we are still 10' below normal for the 12 month period. The rains have been well placed and all gentle soaking in rains, not he 8" downpour and nothing else. I have been using my very new looking, but old, unused mushroom book. My land was also over grazed so between the drought and the cows, it might just be more recuperation of the land.