What are these plants growing around my Pond?

Well.....I need help IDing these.....thanks for any help....Zone 6b in Kentucky. These are growing on the edge of the pond.

size 13 boot for scale reference









I think this last one may be a cat tail shoot. I planted a few seeds from a cat tail head because there is NOTHING growing in or around this pond. THe previous owners cut grass all the way up to the edge. Its a small pond, and I know cat tails can be competitive, so if it takes off too much I'll get in there and dig it up.

pic #1 & 2 Maybe a wild mustard? Sometimes purple leaves are a result of something in the soil, not a trait of the plant itself.
http://www.eattheweeds.com/coronopus-descurainia-cardamine-erucastrum-sibara-2/

Pic #3 looks like daisy fleabane. If so, the stalk will get taller as it flowers. In my climate, depending on how dry or wet their roots are, they grow from 1 to 3 feet tall. This basal rosette in the pic has begun to 'stand up' while your pic has them still hugging the ground. Mine usually have white rays, sometimes with a touch of pink.
https://courses.missouristate.edu/pbtrewatha/daisy_fleabane.htm

#3 Mystery.

Joylynn Hardesty wrote:pic #1 & 2 Maybe a wild mustard? Sometimes purple leaves are a result of something in the soil, not a trait of the plant itself.
http://www.eattheweeds.com/coronopus-descurainia-cardamine-erucastrum-sibara-2/

Pic #3 looks like daisy fleabane. If so, the stalk will get taller as it flowers. In my climate, depending on how dry or wet their roots are, they grow from 1 to 3 feet tall. This basal rosette in the pic has begun to 'stand up' while your pic has them still hugging the ground. Mine usually have white rays, sometimes with a touch of pink.
https://courses.missouristate.edu/pbtrewatha/daisy_fleabane.htm

#3 Mystery.

Wow, the one with the purple leaves sure does look like the toxic Senecio glabellus in your link! Hmmmmm.....maybe I'll wait to see if it has a yellow blossom then pull it out if it does. Thanks for the information