3 literature references:

Author: Lewis,G.P.
Year: 1994
Title:
Source: Studies in neotropical Caesalpinia. PhD Thesis, Univ. St And
Author: Lewis,G.P.
Year: 1994
Title:
Source: Kew Bull.49(1):99-101 New sp. of Parapiptadenia from Brazil
Author: Lewis,G.P.
Year: 1994
Title:
Source: Personal communication