…is the mystery plant in the previous post. The flowers make me think of Abutilon – they have that nodding look – and they’re both in the Malvaceae family.
It’s native to south Asia, where it’s a weed (of course) of rice fields. That reminds me that the Lantana standard I so admired at Monticello is also a weed in India (and probably not trained to a standard there).
Thomas Jefferson may have acquired his Pentapetes seeds from Bernard McMahon, the Philadelphia nurseryman. There is apparently a range of red-to-pink shades. I only saw the red one, but pink is mentioned on the Monticello website.