Ertter, B. (1992). "A re-evaluation of Potentilla drummondii and P. breweri (Rosaceae), with the new species Potentilla morefieldii". Brittonia. 44 (4): 429–435. doi:10.2307/2807193. JSTOR2807193. S2CID8739790.
jstor.org
Ertter, B. (1992). "A re-evaluation of Potentilla drummondii and P. breweri (Rosaceae), with the new species Potentilla morefieldii". Brittonia. 44 (4): 429–435. doi:10.2307/2807193. JSTOR2807193. S2CID8739790.
semanticscholar.org
api.semanticscholar.org
Ertter, B. (1992). "A re-evaluation of Potentilla drummondii and P. breweri (Rosaceae), with the new species Potentilla morefieldii". Brittonia. 44 (4): 429–435. doi:10.2307/2807193. JSTOR2807193. S2CID8739790.