It does not look much like Stackhousia monogyna. The other possibility is Stackhousia pulvinaris, which occurs in alpine herbfields and wet depressions in subalpine grassland, so far only in Kosciuszko National Park. The plant is too poor a specimen to be sure. At least future surveys will know of the possibility of the occurrence of this species and where it might be found.
Of course. As far as I know, there is no limit to the number of pixels per photo. Don’s photos on NatureMapr are about 1,000 pixels on the long side.Even 400 pixels on the long side, which I used, in my app, blows up quite clearly. This is in the .jpg format. However, if you are talking about the .tif format, it will not upload.