Numerical Taxonomy of Southern Red Oak in the Vicinity of Nacogdoches, Texas
Five trees from each of 4 southern red oak varieties, as described by Vines (1960), were tentatively selected near Nacogdoches, Texas, by inspection of leaf forms. Fifteen twig, bud, and floral characteristics were then measured on each tree and these data were subjected to several numerical analyses. Three grouping analyses of the twig, bud, and floral characteristics failed to segregate 4 groups consistent with the original leaf-form classification, but did identify two groups distinguishable by both leaf and twig morphology. The data support 2 taxa within Quercus falcata, one including Vines' varieties falcata and triloba, the other embracing varieties leucophylla and pagodaefolia. Apart from leaf form, number of male flowers per ament best separated the 2 taxa. Whether these are appropriately species or varieties requires further study. FOREST SCI. 23:290-298.
No Supplementary Data
No Article Media