Upper stem branching divaricate (strongly zigzagging) well below the branch tips; leaf blades 2–10 × 0.5–3.5 cm, narrowly ovate to elliptic, acuminate at the tip, coriaceous, the trichomes often obscuring the abaxial surface; endemic to Guatemala Berry green to tan at maturity, sometimes with purple blotches; seeds less than 3 mm long, smooth and shiny to the naked eye; second sympodial branching point usually monochasial

Specimens examined are listed in Appendix I. We also chose representative specimens from the Mexican/Guatemalan distribution of each taxon (one specimen from each state/department where it occurs) and listed them at the end of each taxon treatment. Specimens in these sections are organized alphabetically first by country, then by state/department, then alphabetically by collector’s surname, and then numerically by collection number. No barcode or accession numbers are cited. Because the first author saw and confirmed the identification of all specimens listed in Appendix I and the “Representative Specimens Examined” sections, we did not use exclamation points to distinguish the specimens that we examined. Liquidambar styraciflua'Worplesdon' is a selected variety of sweet gum chosen for its particularly good autumn foliage. This cultivar has the prestigious RHS Award of Garden Merit. Height x Spread: 25m x 12m Calyx glabrous or pubescent, the calyx appendages often2 mm long or more in flower, 3 mm long or more in fruit; plants glabrous to densely pubescent, the trichomes often at least 1 mm long; mature berry orange to red; greater than or less than 1000 m in elevation The treelet algorithm is a binary agglomerative hierarchical clustering algorithm. In terms of a hierarchical graph only, the two most correlated nodes are combined at a given step. For an n by p data matrix, there are total p– 1 layers for a graph combined to completion. The binary combination allows for the multi-resolution interpretability of the resulting basis. At each node a principal components analysis is applied to the pair of variables. The node is then represented by the two components, the first component becoming a “sum” variable, and the second the “difference” variable. Since only the sum variable is allowed to combine in higher levels of the graph, the difference variable remains behind as a residual measure of the combination. Each treelet, comprised of one node (sum variable) and its associated difference variables can be represented by a orthonormal basis.

Vine to scandent shrub; trichomes furcate to multangulate-stellate, those on calyx minute (less than 0.25 mm in diameter) and difficult to see without magnification; leaf blade apex rounded to acute, the leaf veins usually obscure and light green in color; corolla light purple; coastal areas, up to 1000 m in elevation, widespread in Mexico and Central America, especially on the Caribbean slope Laboratorio Nacional de Identificación y Caracterización Vegetal (LaniVeg), Consejo Nacional de Ciencia y Tecnología (CONACyT), Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Camino Ramón Padilla Sánchez 2100, 45110 Nextipac, Zapopan, Jalisco, México, Flowering calyx with rim 0.5 to 1 mm long, the appendages 0.25–11 mm long, free at their bases, not forming a continuous shelf of tissue; Mexico and Central America, 350–3000 m Perennial herb to woody vine or shrub; mature berry red; anthers connate to connivent; usually occurring at or below 1000 m in elevation

Similar to 'Lane Roberts' but with a more pyramidal habit. Crimson and purple autumn foliage. H x S: 25m x 12mFirst sympodial unit usually very well developed (to 90 cm long) with numerous internodes (usually 10–21) and leaves; lateral branching from the nodes of the first sympodial unit usually not present at the time of flowering; subsequent sympodial growth poorly developed; pollen dicolporate; states of Morelos, Michoacán and México, on volcanic soils Lee, A.B. & Nadler, B.. (2007). Treelets | A Tool for Dimensionality Reduction and Multi-Scale Analysis of Unstructured Data. Proceedings of the Eleventh International Conference on Artificial Intelligence and Statistics, in Proceedings of Machine Learning Research 2:259-266 Available from https://proceedings.mlr.press/v2/lee07a.html. Leaf blades glabrous except for trichomes restricted to the axils where the primary veins meet the midvein on the abaxial side; stamens usually equal in length