Known as Prickly Malvastrum, this is an invasive weed from the Americas.  Here in central Tanzania.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/92252798@N07">Dick Culbert</a> from Gibsons, B.C., Canada
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/92252798@N07/26107431355/">Malvastrum coromandelianum</a>