Parkia biglandulosa inflorescence, taken at AC&RI, Killikulam, IndiaParkia multijuga - MHNTParkia pendula - MHNT
In 1995, about 31 species were known.[3] Four more species were outlined in 2009.[4]
Parkia species are found throughout the tropics, with four species in Africa, about ten in Asia, and about 20 in the neotropics. The neotropical species were revised in 1986.[5]
David A. Neill. 2009. "Parkia nana (Leguminosae, Mimosoideae), a New Species from the Sub-Andean Sandstone Cordilleras of Peru". Novon19(2):204-208. doi:10.3417/2007152
Helen C.F. Hopkins and Marlene Freitas Da Silva. 1986. "Parkia (Leguminosae: Mimosoideae) (Flora Neotropica Monograph No. 43) with Dimorphandra (Caesalpiniaceae) (FN Monograph No. 44)". In: Flora Neotropica (series). The New York Botanical Garden Press.