Please identify these wild plants?

Question

Please identify their common names, scientific names, whether native or alien. Are they invasive? They were all collected from Pennsylvania. Thanks all.

http://picasaweb.google.com/lcw1024

Answer 1

1 and 13 are violet.

6 is dandelion.

12 is columbine.

14 is clover.

Answer 2

1 wild violet 2 bloodroot 3 mint? 4johnson grass? 5 ? 6 Taraxacum officinale Dandelion 7 wild strawberry 8 dallis grass? 9 fescue? ?? 12 columbine 13 wild violet 14 Trifolium repens Clover