L. A.  McDade, ?Species concepts: insights from groups that are difficult at the species level?, American Journal of Botany, vol. 18 (Supplement), p. 117, 1993.

L. A.  McDade, ?Species concepts and problems in practice: insight from botanical monographs?, Systematic Botany, vol. 20, pp. 606-622, 1995.

L. A.  McDade, ?Hybridization and Phylogenetics?, in Experimental and Molecular Approaches to Plant Biosystematics, P. C.  Hoch and Stephenson, A. G., Eds. St. Louis: Missouri Botanical Garden, 1995, pp. 305-330.

L. A.  McDade, ?Hybrids and Phylogenetic Systematics III. Comparison with Distance Methods?, Systematic Botany, vol. 22, pp. 669-683, 1997.

L. A.  McDade, ?Hybridization and Phylogenetics?, in Phylogenetic Analysis of Morphological Data, J. J.  Wiens, Ed. Washington DC: Smithsonian Institution Press, 2000, pp. 146-163.