Delonix regia
By 1642 Poincy started building the Château de la Montagne on his estate called La Fontaine. This was an elaborate building, credited as being one of the grandest ever constructed in the Americas, though today it is in ruins. The grounds of La Fontaine were also heavily planted with exotic tropical plants. The Poinciana (Caesalpinia pulcherrima) was named in his honor, the name later becoming secondarily associated with the Royal Poinciana (Delonix regia).