Türkiye is one of the world’s leading countries in terms of plant biodiversity due to its geographical location at the intersection of three major phytogeographical regions (Euro–Siberian, Mediterranean and Irano–Turanian), as well as its diverse climate types and topographical structure. Approximately 12,000 plant taxa are recorded in Türkiye, with a remarkably high level of endemism. Within this rich flora, sumac (Rhus spp.), which occurs naturally, stands out as a plant of both economic and ecological importance. Sumac is the common name given to nearly 150 species belonging to the genus Rhus within the family Anacardiaceae. In Türkiye, two main species occur naturally: Rhus coriaria L. (Sicilian sumac) and Rhus cotinus L. (smoke tree). Among these, R. coriaria L. is primarily used as a spice and is widely distributed in the temperate–subtropical regions of the Mediterranean basin. Naturally distributed sumac species in Türkiye are utilized in various sectors, particularly in food, medicinal–aromatic plants, ornamental horticulture, and health-related industries. The aim of this study was to identify local Rhus coriaria L. genotypes with high yield potential and superior morphological characteristics in terms of ornamental value. In this context, a two-year field study including site determination, sampling, and morphological observations was successfully conducted in Kahramanmaraş, Mersin, and Adana provinces. Plant materials obtained from the study were evaluated based on the “Sumac Variety Characteristic Document” published by the Ministry of Agriculture and Forestry (2024). Morphological and technological characterization of the genotypes was carried out, taking their potential use as ornamental plants into consideration. A total of ten morphological traits were measured and observed, including branching structure, plant growth habit, cluster density per plant, fruit density per cluster, fruit color, leaf length, leaf width, cluster length, cluster width, and cluster weight. The observed variation offers significant potential for selecting ornamental plant candidates with high aesthetic value and constitutes a strategic resource for the conservation of local genetic resources and the development of sustainable production systems. This study highlights the importance of sumac not only in terms of food and industrial uses but also for biodiversity conservation and its evaluation as a landscape ornamental plant.