Kaliwatan sa sitaw ang Rhynchosia nyasica.^[1] Una ning gihulagway ni John Gilbert Baker. Ang Rhynchosia nyasica sakop sa kahenera nga Rhynchosia, ug kabanay nga sitaw.^[1][2]

Kini nga matang hayop na sabwag sa:

• Demokratikanhong Republika sa Konggo
• Mozambique
• Kenya
• Etyopiya
• Tanzania
• Uganda
• Guinea
• Kamerun
• Zambiya
• Sierra Leone
• Anggola
• Malawi
• Chad
• Sudan
• Rwanda
• Ghana
• Benin
• Togo
• Mali
• Nigyeriya

Walay nalista nga matang nga sama niini.^[1]

1. ↑ ^{1.0 1.1 1.2} Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2019). "Species 2000 & ITIS Catalogue of Life: 2019 Annual Checklist". Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X. TaxonID: 11469714. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Roskov Y., Zarucchi J., Novoselova M. & Bisby F. (†) (eds). (2019). ILDIS World Database of Legumes (version 12, May 2014). In: Species 2000 & ITIS Catalogue of Life, 2019 Annual Checklist (Roskov Y., Ower G., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., Nieukerken E. van, Zarucchi J., Penev L., eds.). Digital resource at www.catalogueoflife.org/annual-checklist/2019. Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X.