Matthews, J.F. & Ketron, D.W. 1991: Two New Combinations in Portulaca (Portulacaceae). – Castanea 56: 304-305

Title	Two New Combinations in Portulaca (Portulacaceae).
Authorship	Matthews, J.F. & Ketron, D.W.
Date published	1991
Volume	56
In journal	Castanea
Pages	304-305