That's why I asked on here, I don't want him getting poisoned. They should all be from a tortoise weed mix I bought but unfortunately it didn't come with photos.Not offhand, but my rule of thumb is generally to remove any plants from my tort enclosure if I don't know what they are. Steve has a large enclosure with plenty to eat so I'd hate to take a chance by keeping a plant that ends up making him sick, or worse.
Another tip I have is to put down Popsicle stick markers in the spring when I first plant seeds or baby plants. I will forget what they are months later if they don't sprout or bloom until later in the season. The only problem I have with the sticks is that they come up from the ground in the winter because the dirt freezes. I'm getting better at identifying my plants though!You could also draw a "map" of your garden on paper and then divide that up into a grid. In each grid you can identify the plant(s) growing there. Unfortunately, I have removed plants I wanted to keep by accident, but it happens.
For plant identification, I sometimes use the "Ask an Expert" feature from the Michigan State University Agriculture Dept: https://ask.extension.org/ask You can submit a photo with your question. Be sure to include your location.