Petaladenium
Introduction '''''Petaladenium urceoliferum''''' is a species of flowering plant in the family Fabaceae. It is a tree native to northern Brazil. It grows in tropical lowland Amazon rain forest in the basin of the Rio Negro, a northern tributary of the Amazon. It is the only member of the genus ''Petaladenium''. The genus belongs to tribe Amburaneae in subfamily Faboideae. It produces three chemical compounds in its leaves that are not found in other members of the Amburaneae: (2''S'',4''S'',5''R'')-5-hydroxy-4-methoxypipecolic acid, (2''S'',4''R'',5''S'')-5-hydroxy-4-methoxypipecolic acid, and (2''S'',4''R'',5''R'')-4-hydroxy-5-methoxypipecolic acid. ''Petaladenium urceoliferum'' is unique among legumes in having fimbriate–glandular wing petals.
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