Friedman, W.E., S.C.H.Barrett, P.K. Diggle, V.F. Irish and L. Hufford.  2008.  Whither plant evo-devo?  Investigating the evolution of plant form:  conceptual integration from the molecular to the ecological.  New Phytologist 178: 468-471.

Bissell, E.K. and Diggle, P.K. 2008. Floral morphology in Nicotiana: architectural and temporal effects on phenotypic integration.  International Journal of Plant Sciences 169: 225-240.

Miller, J. S. and Diggle P.K. 2007. Correlated evolution of fruit size and sexual expression in andromonoecious Solanum sections Acanthophora and Lasiocarpa (Solanaceae). American Journal of Botany 94: 1706-1715.

Mitchell, CH. and P. K. Diggle. 2005. The evolution of unisexual flowers: morphological and functional convergence result from diverse developmental transitions. American Journal of Botany 92:1068-1076.

Diggle, P.K. and J.S. Miller. 2004. Architectural effects mimic floral sexual dimorphism in Solanum (Solanaceae). American Journal of Botany 91: 2030-2040.

Diggle, P.K. 2003. Architectural effects on floral form and function: a review. In, T. Stuessy, E. Hörandl and V. Mayer (eds) Deep Morphology: Toward a Renaissance of Morphology in Plant Systematics. Koeltz, Königstein.

Meloche, C.G. and P.K. Diggle. 2003. The pattern of carbon allocation supporting growth of preformed shoot primoridia in Acomastylis rossii. American Journal of Botany 90: 1313-1320.

Miller, J.S. and P.K. Diggle. 2003. Diversification of andromonoecy in Solanum section Lasiocarpa (Solanaceae): the roles of phenotypic plasticity and architecture. American Journal of Botany 90: 707-715.

Bechtold, H.A., T.A. Forbis, W.D. Bowman , and P.K. Diggle. 2002. Lack of reproductive plasticity in alpine Saxifraga rhomboidea Greene (Saxifragaceae). Nordic Journal of Botany 26: 361-368.

Diggle, P.K. 2002. A developmental morphologist's perspective on plasticity. Evolutionary Ecology 16: 267-283. (Invited contribution to an issue devoted to discussion of the topic of developmental plasticity).

Diggle, P.K., M.A. Meixner, A.B. Carroll, and C.F. Aschwanden. 2002 (in press) Barriers to sexual reproduction in Polygonum viviparum: a comparative developmental analysis of P. viviparum and P. bistortoides. Annals of Botany 89: 145-156.

Forbis, T.A. and P.K. Diggle. 2001. Sub-nivean embryo development in the alpine herb Caltha leptosepala (Ranunculaceae). Canadian Journal of Botany 79: 635-642.

Meloche, C.G. and P.K. Diggle. 2001. Preformation, architectural complexity and developmental flexibility in Acomastylis rossii(Rosaceae). American Journal of Botany 88: 980-992.

Marshall, D. L. and P.K. Diggle. 2000. Mechanisms of differential pollen donor performance in wild radish, Raphanus sativus (Brassicaceae). American Journal of Botany 88: 242-257.

Diggle, P.K. 1999. The influence of development and architectural constraints on the evolution of flowering phenologies. International Journal of Plant Sciences 160: S123-S134.

Moody, A. , P.K. Diggle, and D.A. Steingraber. 1999. Developmental analysis of the evolutionary origin of the vegetative propagule of Mimulus gemmiparus (Scrophulariaceae). American Journal of Botany 86: 1512-1522.

Diggle, P.K., S.S. Lower, and T.A. Ranker. 1998. Clonal diversity in alpine populations of Polygonum viviparum. International Journal of Plant Sciences 159:606-615.

Gibson J.P, and P.K. Diggle. 1998. Flower development and male sterility in Ocotea tenera Mez &J.D. Smith ex Mez (Lauraceae): A gynodioecious tropical tree. International Journal of Plant Sciences 159:405-417.

Diggle, P.K. 1997. Ontogenetic contingency and floral morphology: the effects of architecture and resource limitation. International Journal of Plant Sciences 158:S99-S107.

Aydelotte, A.R. and P.K. Diggle. 1997. Analysis of developmental preformation in the alpine herb, Caltha leptosepala. American Journal of Botany 84: 1648-1657.

Diggle, P.K. 1997. Extreme preformation in alpine Polygonum viviparum: an architectural and developmental analysis. American Journal of Botany 84: 154-169.

Gibson, J.P. and P.K. Diggle. 1997. Structural analysis of female and hermaphroditic flowers of a gynodioecious tree Ocotea tenera (Lauraceae). American Journal of Botany 84: 298-307.

Diggle, P.K. 1995. Architectural effects and the interpretation of patterns of fruit and seed development. Annual Review of Ecology and Systematics 26: 531-552.

Fenster, C.B., P.K. Diggle, S.C.H. Barrett, and K.R. Ritland. 1995. The genetics of floral development differentiating two species of Mimulus (Scrophulariaceae). Heredity 74:258-266.

Diggle, P.K. 1994. The expression of andromonoecy in Solanum hirtum: phenotypic plasticity and ontogenetic contingency. American Journal of Botany 81: 1354-1365.

Diggle, P.K. 1993. Developmental plasticity, genetic variation and the evolution of andromonoecy. American Journal of Botany 80: 967-973.

Diggle, P.K. 1992. Development and the evolution of plant reproductive characters. In: R. Wyatt (ed.), Ecology and Evolution of Plant Reproduction: New Approaches. Chapman and Hall. New York. Pp 326-355.

Diggle, P.K. 1991. Labile sex expression in andromonoecious Solanum hirtum: floral morphogenesis and sex determination. American Journal of Botany 78: 377-393.

Diggle, P.K. 1991. Labile sex expression in andromonoecious Solanum hirtum: sources of variation in mature floral structure. Canadian Journal of Botany 69: 2033-2043.

Diggle, P.K. 1988. Sex expression in Solanum hirtum: an Overview. In: Aspects of Floral Development. P.L. Leins, S.C. Tucker, and P.K. Endress, editors. E. Schweizerbartsche Verlagbuchhandlung, Stuttgart.

DeMason, D.A. and P.K. Diggle. 1984. The relationship between the primary thickening meristem and secondary thickening meristem in Yucca whipplei Torr. III. Observations from histochemistry and autoradiography. American Journal of Botany 71: 1260-1267.

Diggle, P.K. and D.A. DeMason. 1983. The relationship between the primary thickening meristem and secondary thickening meristem in Yucca whipplei Torr. I. Histology of the mature vegetative stem. American Journal of Botany 70: 1195-1204.

Diggle, P.K. and D.A. DeMason. 1983. The relationship between the primary thickening meristem and secondary thickening meristem in Yucca whipplei Torr. II. Ontogenetic relationship within the vegetative stem. American Journal of Botany 70: 1205-1216.

Edited Volumes

Diggle, P.K. and P.K. Endress (editors). 1999. Development, Function, and Evolution of Symmetry in Plants. International Journal of Plant Sciences 160 Supplement

Diggle, P.K. and L. Hufford (editors). 1997. The Morphology and Evolution of Flowers. International Journal of Plant Sciences. 158 Supplement.

Non-refereed Publications

Diggle, P.K. 2000. Creativity and Development. Review of The Art of Genes: How Organisms Make Themselves. Enrico Coen. 1999. Oxford University Press. American Journal of Botany 87: 597-600.

Diggle, P.K. and P.K. Endress. 1999. Symmetry in plants: an introduction. International Journal of Plant Sciences 160: S1-S2.

Hufford, L. and P.K. Diggle. 1997. Introduction to morphology and evolution of flowers. International Journal of Plant Sciences. 158: S1-S2.