Dichanthelium perlongum, commonly known as Long-panicled Panicgrass, is a perennial grass species native to North America. This species is characterized by its distinctive inflorescence, which gives it its common name. As a member of the Dichanthelium genus, it shares characteristics with other panicgrasses, but possesses unique traits that distinguish it within its taxonomic group. Physically, Dichanthelium perlongum typically grows in erect clumps, reaching heights that can vary but often range from 60 to 120 centimeters. Its leaves are generally long and narrow, with a smooth texture and a prominent midrib. The leaf sheaths are typically smooth, and the ligule is a fringe of short hairs. The most striking feature of this grass is its panicle, which is notably long and open, often exceeding half the length of the entire plant. The panicle branches are slender and bear numerous small spikelets. The spikelets themselves are typically ovate and awnless, with the lower glume being shorter than the upper glume. The caryopses, or grains, are small and ovate. The native range of Dichanthelium perlongum extends across parts of the eastern and central United States. It thrives in a variety of open habitats, often found in dry, sandy soils, prairies, savannas, open woodlands, and along roadsides. It prefers well-drained soils and can tolerate a range of light conditions, from full sun to partial shade. While not widely cultivated, its adaptability to drier conditions and its attractive inflorescence suggest potential for use in native landscaping and ecological restoration projects. Ecologically, Dichanthelium perlongum plays a role in its native ecosystems by providing habitat and forage for various wildlife. Its seeds are a food source for small birds and mammals. As a perennial grass, it contributes to soil stabilization and nutrient cycling within its natural environment. There is no widespread documented economic, medicinal, or culinary importance for this species. An interesting characteristic of Dichanthelium perlongum, common to many Dichanthelium species, is its inflorescence development. While the primary panicle is large and open, the plant can also produce smaller, more contracted panicles or even solitary spikelets in the axils of upper leaves, particularly later in the season. This phenomenon, known as cleistogamy, involves the production of self-pollinating flowers that remain closed, ensuring seed set even under less favorable conditions. This adaptation contributes to the species' reproductive success and resilience in its natural habitats. The long, open panicle is an adaptation for wind pollination, maximizing the dispersal of its pollen and the capture of airborne pollen from other individuals.