Literature

Authors	Year	Title
W. S. Judd, Campbell, C. S., Kellogg, E. A., Stevens, P. F., Donoghue, M. J.	1999	Plant Systematics: A Phlogenetic Approach
P. F. Stevens	1997	J.D.Hooker, George Bentham, Asa Gray and Ferdinand Mueller on species limits in theory and practice: a mid-nineteenth-centurydebate and its repercussions
P. F. Stevens	1991	Character States, Morphological Varation, and Phylogenetic Analysis: A Review
P. F. Stevens	1987	Genera, what and why - some thoughts
P. F. Stevens	1986	Evolutionary classification in botany, 1960-1985
P. F. Stevens	1985	The genus concept in practice - but for what practice
P. F. Stevens	1984	Homology and phylogeny:Morphology and systematics
P. F. Stevens	1984	Metaphors and typology in the development of botanical systematics 1690-1960, or the art of putting new wine into old bottles
P. F. Stevens	1980	Evolutionary polarity of character states
P. F. Stevens	1990	Nomenclatural stability, taxonomic instinct, and flora writing - a recipe for disaster
P. F. Stevens	1995	What kind of classifification should the practising taxonomist use to be saved

1999

1997

1991