First image is awesome, do you know what type of flower that is? A weed perhaps?

Your second and third images are decent, however, I think you could drop the exposure on them a bit more to make the flower more visible. Do you edit your photographs? If you don't use Photoshop, I've found that Lightroom is a brilliant application for editing photos from your phone.

And it's very kind of you to share your photographs with people without expecting royalties or credit. Keep up the good work!