Looks like common mallow (Malva neglecta). Generally it is a pretty annoying weed. They have a long, woody taproot that is hard to pull out. If you want to get rid of them, make sure to not let them go to seed. Here are some images: http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Malva+neglecta

Just a suggestion for future postings, you may wish to number your images and break up your images into smaller groups (maybe 5 or 6 in a group at most). It's easier for people to answer so you'll get better responses. In #6 I see, vinca, lily or the valley or tulip leaves (unsure which), violets, star of Bethlehem, lupine #9 Looks like a spiderwort to me. Plus there is feverfew, vinca, bindweed, and of course, wheat! #10, besides the milkweed, you have mulberry, ground ivy, maple, and perhaps a daylily #23 - I see swallowwort, vinca, violet, maple FataMorgana

For newcomers this site is actually pretty hard to navigate, edit, post and upload pictures. But since we are on the topic of Velvet Leaf and in light of the toilet paper madness because of covid19, I just gotta say.... If we ever DO have to worry about toilet paper shortages... (which is NOT at this time btw) I would just forage around for this plant! The leaves make an acceptable wipe (or so I heard).

Looks similar to Microstegium vimineum, Japanese Stilt grass. Here is a link that might be useful: Japanese Stilt Grass