Wow! You are awesome, Zuzu! Thank you.
The company that sent it sells both Abundance and Carmencita, which does look possible now that you've got me this far - except...I don't see any signs of Carmencita having five tepals. My plant
does display the characteristic longer pistils than stamens...
...but wait! Look here! This says that Carmencita
can have 4 - 6 tepals, so I guess they did send the right plant, after all.
http://www.clematis.hull.ac.uk...
