Its a nice we plant Sharon.
The leaves certainly look like M. rudis, but i alwasy theough the anthers were white? I had a look in teh Chris Grey Wilson Book and it seems to be very close to M. bijiangensis. Take a look Page 271. as the anthers and stamens look exactly like your plant. Even the leaves with the broad winges petiole seem good
take a look and let us know your thoughts.