I only have my cell phone for pictures, hard to get good close ups in focus. Here are a couple of her along with another female and a male. Sorry about the messy faces!! a couple of the pics were taken with the flash turned on and gave the eyes a reddish center.
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you might try putting some potted plants in with them. Even artificial plants will help if you mist them a couple times a day and get them good and wet. Spider plants work well and are safe for the tortoises, you can leave them in their pots and place a couple in the enclosure. keep them watered...
that's Bidens alba common name is spanish needles or beggars tick. when it matures it will have small white and yellow daisy like flowers. the leaves are edible for both tortoises and people. I feed them to my red foots.
the 2nd one is Urena lobata, which is in the hibiscus family and is also edible. I have never tried feeding it to any of my torts, I pull them up by the roots when I find any coming up in my yard because they have a hard pricker seed bur that is hard to remove from our dog's hair.