Taxonomic problems have caused some confusion in the International Provenance Trials of the Pinus pseudostrobus complex organized by the Commonwealth Forestry Institute (CFI). A study of variation and taxonomy of the Pseudostrobus group was recently completed at the CFI and this paper summarizes the work done. Principal Components Analysis and Canonical Discriminant Analysis were used to examine data from range wide collections. It was discovered that there are three well defined species in the group P. pseudostrobus Lindl., P. maximinoi H.E. Moore (the correct name for P. tenuifolia Benth.) and P. douglasiana Martinez. The very variable P.pseudostrobus was found to have two infraspecific taxa P. pseudostrobus subsp. apulcensis (Lindl.) Stead and P. pseudostrobus var. oaxacana (Mirov) Harrison. Analysis of voucher specimens and results from a CFI trial in Honduras indicate that seed lots of two species, P. pseudostrobus and P. maximinoi, have been included in the trials. The correct names for all the seed lots included in trials are given in a table.
Commonwealth Forestry Review (1983) 62 (1) 25-35