Dichanthelium cryptanthum, commonly known as hidden-flower witchgrass, is a perennial grass species native to the southeastern United States. This species is characterized by its relatively small size and a growth habit that can vary from erect to somewhat spreading, typically reaching heights between 30 and 70 centimeters. The leaves are generally flat, linear to lanceolate, and measure about 10 to 25 centimeters in length and 3 to 7 millimeters in width, often exhibiting a rough texture. A distinctive feature of Dichanthelium cryptanthum is its inflorescence, which is often contracted and partially or entirely enclosed within the upper leaf sheaths, hence the common name "hidden-flower." The spikelets are typically ovate and measure approximately 1.5 to 2.5 millimeters long. The fruits are small caryopses, characteristic of the grass family. This grass is primarily found in sandy soils, pine flatwoods, savannas, and open woodlands, often in areas with moderate to good drainage. Its native range extends across several southeastern states, including Florida, Georgia, South Carolina, and Alabama. Dichanthelium cryptanthum thrives in full sun to partial shade and prefers well-drained, somewhat acidic soils. While it is adapted to its native habitats, it is not widely cultivated, and specific horticultural requirements beyond these general preferences are not extensively documented. Ecologically, Dichanthelium cryptanthum plays a role in its native ecosystems as a component of the herbaceous layer, providing forage and habitat for various small animals and insects. Its seeds are a food source for some birds. The "hidden" nature of its flowers suggests an adaptation that may protect them from desiccation or herbivory, or perhaps facilitates pollination by specific vectors that can access the enclosed inflorescences. This characteristic is a key identifier for distinguishing it from other closely related Dichanthelium species. The plant's ability to persist in sandy, nutrient-poor environments highlights its resilience and adaptation to specific ecological niches. Further research into its specific ecological interactions and potential uses is ongoing within botanical and ecological studies.