Published Research and Horticultural Articles

PCIs have long been a focus of taxonomic research. Not all reseach reports are available through this website or online through publication services. Some particularly helpful articles have been republished by SPCNI as booklets, or included in issues of the Almanac. A university library is often the best source for research papers. Theses and dissertations are available by contacting the college or university where the work was originally submitted, or through a republishing services.

Online republication services typically require a fee to provide PDF-format article copies. They do not guarantee that all graphs, photographs or other non-text elements in the original report will be included in the digital copy, or if included, will be of the same quality as the original.

Reprints that SPCNI can provide are noted in the following list, and have been made available by permission of the originating author and or publisher, or the association that originally printed the work.

Clarkson, Q. D. 1955. Cytotaxonomic Studies in Iris, Section Apogon Baker, Subsection Californicae Diels. Thesis, Oregon State College, Corvallis.

Clarkson, Q. D. and Thompson, D. I. 1961. Analysis of a hybrid Iris near Elmira, Lane County, Oregon. Northwest Science 35: 27-31.

Clarkson, Q. D. 1962. Ecological factors in the hybridization of Iris tenax douglasiana (Herbert) Clarkson Iris tenax innominata (Henders.) Clarkson. Northwest Science 36: 59-64.

Cohen, Victor A. 1967. A Guide to the Pacific Coast Irises. British Iris Society, 40 pages. Reprint available from SPCNI with permission of BIS, see Products section.

Foster, R. C. 1936. A new Iris from California. Rhodora 38: 199.

Foster, R. C. 1937. A Cyto-Taxonomic Survey of the North American species of Iris. Contri. Gray Herbarium, 119: 1-82.

Goldblatt, P., Rodriguez, A., Powell, M. P., Davies, T. J., Manning, J. C., van der Bank, M. and Savolainen, V. 2008. Iridaceae "Out of Australasia"? Phylogeny, biogeography, and divergence time based on plastid DNA sequences. Systematic Botany 33: 495--508.

Lacey, Louise, Editor. 1996. Pacific Coast Native Iris. Growing Native Vol. 7: 1, January / February 1996, #31. This issue (#31) focused on PCIs, with three articles by Lewis Lawyer and Adele Lawyer. Printed copies are available from Growing Native. Order GN #31 by mail at: Growing Native, P O Box 489, Berkeley CA 94701. Cost is $6. This issue is not available online.

Lacey, Louise. 2004. Perennials: 175 California Natives. 50 pages. Available at as direct download PDF; $15.

Lenz, Lee W. 1958. A Revision of the Pacific Coast Irises. Aliso 4: 1-72. Reprint available from SPCNI, see Products section.

Lenz, Lee W. 1959. Hybridization and Speciation in the Pacific Coast Irises. Aliso 4: 237-309. Reprint available from SPCNI, see Products section.

Riddle, M. C. 1948. Iris innominata. Journal California Horticultural Society 9: 13-18.

Smith, F. H. and Clarkson, Q. D. 1956. Cytological Studies of Interspecific Hybridization in Iris subsection Californicae. American Journal of Botany 43: 582-588.

Wilson, C. A., Levinson, A., and Petersen, R. 1990. An Investigation into the Status of Iris thompsonii (Iridaceae). Madrono 37: 113-123.

Wilson, C. A. 1998. A cladistic analysis of Iris series Californicae based on morphological data. Systematic Botany 23: 73-88.

Wilson, C. A. 2003. Phenetic and intervarietal crossing data support the recognition of Iris tenax var. gormanii (Iridaceae), a rare northwest endemic. Madrono 50: 15-20.

Wilson, C. A. 2003. A phylogenetic analysis of Iris series Californicae based on ITS sequences of nuclear ribosomal DNA. Systematic Botany 28: 39-46.

Wilson, C. A. 2005. Patterns of evolution in characters that define Iris subgenera and sections. Special Issue: Proceedings of the 3rd International Monocot Conference. Aliso 22: 425-433.

Wilson, C. A. 2009. Phylogenetic relationships among the recognized series in Iris section Limniris. Systematic Botany 34: 277-284.

Wilson, C. A. 2011. What are the taxonomic relationships of the Pacific Coast Iris? SPCNI Almanac 40. Reprint available from SPCNI, see Products section, order Almanac volume 40, Fall 2011.

Young, N. D. 1996a. Concordance and Discordance: A tale of two hybrid zones in the Pacific Coast Irises (Iridaceae). American Journal of Botany 83: 1623-1629.

Young, N. D. 1996b. An analysis of the causes of genetic isolation in two Pacific Coast Iris hybrid zones. Canadian Journal of Botany 74: 2006-2013.

Young, N. D. 1998. Pacific Coast Iris species delimitation using three species definitions: biological, phylogenetic and genealogical. Biological Journal of the Linnean Society 63: 99-120.