Because the elevational gradient of the Andes is a fundamental correlate of the structure, function, and dynamics of its Cloud forest, I sampled treespecies, families and physical structure across an 1100 m elevational gradient – at 100 m intervals from 1900 m to 2800 m – in an Andean Cloud forest close to Loja in Southern Ecuador.  I found (1) the species Clusia sp., Nectandra membrenacea and Miconia puncta, andthe families Clusiaceae, Lauraceae, Melastomataceae,and Rubiaceae, were most common with Annonaceae, Cyatheaceae, Hypericaceae, Malvaceae and Solanaceae least common and (2) skewed unimodal curves best fit the species and symmetric unimodal (Gaussian) curves best fit the families.I also found (1) totalstem density increased with elevation (772/ha – 984/ha) but not monotonically with the smallest stem size always the most common and (2) linear curves best fit physical structure.  Iconclude that while both tree species and tree families were distributed individualistically across this Andean elevational gradient, with two families showing a peak at mid-elevations,stem density increased with elevation as stem sizedecreasedwhich lead to several parameters (e.g., basal area, above-ground biomass) being unchanged while others (e.g., richness, diversity) were always low.