Supplemental data for: Classification of the Celastrales based on integration of genomic, morphological, and Sanger-sequence characters

<p>We present the best sampled phylogenetic analysis of Celastrales, with respect to both character and taxon sampling, and use it to present a natural classification of the order.  Parnassiaceae are highly supported as sister to Celastraceae; we recognize both families as distinct. <em>Pottingeria</em> is highly supported as a member of an early derived lineage within Celastraceae.  We recognize and circumscribe 13 subfamilies in Celastraceae, including the new subfamilies Crossopetaloideae, Maytenoideae, Microtropioideae, Monimopetaloideae, and Salaciopsioideae. We identified five genera that likely require generic recircumscriptions: <em>Cassine</em>, <em>Elachyptera</em>, <em>Gymnosporia</em>, <em>Salacia</em>, and <em>Semialarium</em>.  Genera that had not been previously sampled in Sanger-sequence-based studies are resolved as follows: <em>Arnicratea</em> is sister to <em>Reissantia</em>, <em>Bequaertia</em> is in a clade with <em>Campylostemon</em> and <em>Tristemonanthus</em>, <em>Goniodiscus</em> is sister to <em>Wilczekra</em>, <em>Ptelidium</em> is nested within <em>Elaeodendron</em>, and <em>Tetrasiphon</em> is most closely related to <em>Gyminda</em>.</p>