Well, the first is a violet--as to 'the right one', I don't know. but the other two are indeed plantain. :)

Have fun!

I couldn't tell you exactly what kind your violet is, but I'm pretty sure it would host fritillaries. I have one that looks very similar to that and it gets fritillaries. Your other pictures are definitely plantain but not sure exactly what kind on that either. I'm not sure if both narrow leaf and broad leaf plantain are host plants or just the narrow leaf. Sorry I'm not a whole lot of help, but I thought others would have answered you by now. Let us know if you get any cats on any of your plants.
Cathy

The link I have posted below has lists of host plant flowers, herbs, trees, and vines. It also provides nectar plants of all kinds too. Many of which provide pictures.

Here is a link that might be useful: host and nectar plant fact sheets

Your violet closely resembles the ones I have all over my yard, but they don't appear to host any fritillaries for me. However, the only fritillary I get is the Variegated Frit. I don't know if it would attract the other species of fritillaries or not.

I think you have the broadleaf plantain, and any plantain will host Buckeyes.

Susan

I also have violets covering my yard. but have never had a variegated Fritillary. Although .4 miles from here I witnessed a variegated Frit laying eggs on these same violets. the difference- location, specifically- the violets were struggling in the middle of a gravel road. the road was about 15 yards from a river. sunlight was dappled on the road but bright hot just past it. I keep the violets waiting for them.
I have the broad leaf plantain but our buckeyes seem to prefer the false foxglove for egg laying, but will eat snapdragons. I think since butterflies are so persnickety it is worthwhile to have all the possibilites covered.

Boy, you said it butterflyalley! The Buckeyes have a whole range of different host plants, so I have several scattered now in the yard, including plantain, snapdragons (they are supposed to prefer to dwarf), and several others I don't recall right now. Do you know the latin name for false foxglove?

MissSherry, who also lives in Louisiana, says the variegated frits prefer the passiflora incarnata. Do you have that?

Susan

I think it is also called gerardia - false foxglove- agalinis fasciculata.in 2003 I rescued about 20 buckeyes from these plants on a dirt road that were dying in a drought period.(they ate cultivated snapdragons and plenty of it) I have not successfully grown the plants- they did not survive transplanting, but I recently got some seeds- they get sown in the fall. I have never seen variegateds in my yard. i have 3 varieties of passaflora, including the maypop-incarnata which grows wild all around. But you never know what you will get.among my rarest were striped hairstreaks on my cherry. but just for unpredicitability- I have had hackberry for 6 years and this is the first for snouts. for the buckeyes I have the twinflower, plantain, frogfruit and snapdragons- probably others. I want the summer snapdragons as the others don't like the heat.I think that
Miss Sherry has a very different habitat than I do. I'm Terrace sandwiched between river bottomlands. Our lows are in the 40's tonight and highs in the upper 80's tommorrow- typical.

I think I recall it being said on this forum, and I believe it was MissSherry (our fountain of knowledge here) that gerardia is a parasitic plant, needing other plants to "host" it. Maybe that's why it's so hard to transplant???

Also forgot, Ruellia is another host plant for Buckeyes.

I'm curious, were your snaps the tall or dwarf variety?

Susan