Two populations in southern Florida are particularly notable. The more southern of these two populations feeds on the seeds of a native host vine balloon vine ("Cardiospermum corindum"). This vine produces capsules of a fairly uniform size, which adult "J. haematoloma" feed on by inserting their mouthparts (beak) through the capsule's exterior and into the interior seeds. In the mid-1950s, a related southeast Asian tree, the Taiwanese Flamegold ("Koelreuteria elegans"), was introduced as an ornamental plant. It escaped domestication and naturalized. Significantly, the Flamegold was colonized by "J. haematoloma", though its capsules are smaller and the seeds less deeply embedded than in the balloon vine.