Boatwright, J. S., and A. N. Moteetee. “<em>Rhynchosia bolusi</em><em>i</Em> (Phaseoleae, Fabaceae), a New Species from the Western Cape Province of South Africa”. Phytotaxa, vol. 161, no. 2, Feb. 2014, pp. 169–172, doi:10.11646/phytotaxa.161.2.9.