First one looks like a Prenanthes sp. Would guess Packera paupercula for the second one, or possibly P. plattensis. Older references might include them in the genus Senecio.

I agree with Rootdigger as to studying plants on site where there are labels, and the links she has given are very good ones. However, in a class I recently took they recommended Lawrence Newcomb's WILDFLOWER GUIDE and the newer edition of WILDFLOWERS OF NC (Justice,Bell, Lindsey)...but the latter is not arranged in any order, so it is difficult to use, IMHO. We also used Dr. Jon Stucky's KEY TO FAMILES AND GENERA OF NATIVE AND NATURALIZED WINTER & SPRING FLOWERING HERBS, VINES, &SHRUBS OF THE RALEIGH AREA, which was fairly easy to use. Since Sqftgarden is in western NC, some of the TN books would also be good. Again, going to gardens where there are labels helped me more than the books did several years ago when I first seriously tried to learn names of these wonderful natives. After seeing them in the garden setting, then I walked around in the mountains and here in the Piedmont and tried to apply what I saw in those gardens and in the books. I am still trying to learn...I keep noticing things that I had not seen before. Oh, if you join NCNPS, you can also join one of the local groups. The Greensboro area group has its own website, and folks often post photos of things for ID.

Definitely not the Epipactis Helleborine. This particular plant stays in this form, and doesn't really sprawl when (if) it flowers. It seems to stay very compacted. If I recall, the flower was set in the leaves instead of forming out, if that makes any sense! I'll have to keep an eye on it every day to watch for a flower.

First needs closer views, second is burning bush