Dichanthelium glabrifolium, commonly known as smooth-leaved witchgrass, is a perennial grass species native to the southeastern United States. This species belongs to the genus Dichanthelium, which was formerly included in the genus Panicum, and is characterized by its unique inflorescence structure and growth habit. Smooth-leaved witchgrass plays a role in its native ecosystems, contributing to the biodiversity of grassland and open woodland habitats. Physically, Dichanthelium glabrifolium is a relatively small to medium-sized grass, typically reaching heights of 30 to 70 centimeters. It exhibits an erect to spreading growth habit, often forming loose clumps. The leaves are a key distinguishing feature, being smooth (glabrous) on both surfaces, hence the common name. The leaf blades are generally flat, linear to lanceolate in shape, and measure between 10 to 25 centimeters in length and 5 to 10 millimeters in width. The ligule, the membrane at the junction of the leaf blade and sheath, is typically a dense fringe of hairs. The inflorescence is a panicle, which can be open or somewhat contracted, bearing numerous small spikelets. These spikelets are typically ovate and range in color from green to purplish. The flowering period usually occurs from late summer through autumn. The seeds are small and are contained within the spikelets. The native range of Dichanthelium glabrifolium is primarily concentrated in the southeastern United States, extending from the coastal plain into the Piedmont region. It thrives in a variety of open habitats, including dry to mesic prairies, savannas, open pine woodlands, sandy fields, and disturbed areas such as roadsides and power line clearings. It prefers well-drained soils, often sandy or loamy, and can tolerate a range of light conditions from full sun to partial shade. While not widely cultivated, its ecological role in supporting native fauna and its adaptability to certain soil types suggest potential for use in ecological restoration projects or native landscaping in its natural range. While Dichanthelium glabrifolium does not possess widely recognized ornamental, agricultural, medicinal, or culinary uses, it contributes to the ecological health of its native habitats. As a component of native grasslands, it provides forage and habitat for various insects and small animals. Its presence can indicate healthy, open environments. Interesting adaptations of Dichanthelium species include their ability to produce both chasmogamous (open-pollinated) and cleistogamous (self-pollinated) flowers, which can enhance reproductive success under varying environmental conditions. The smooth leaf surfaces are a notable characteristic that aids in its identification among other Dichanthelium species.