Calcareous glade
Calcareous glade vegetation is more similar to that of a desert habitat than a grassland, being dominated by small spring annuals with occasional geophytic or succulent perennials.Outside of the Central Basin, calcareous glades are found in lower numbers throughout the Interior Low Plateau, and species endemism is greatly reduced.The name comes from the abundance of eastern red cedar (Juniperus virginiana) that occurs on the margins of the glades or in cracks in the bedrock where the roots can gain a foothold.[1] Species indicative of Ozarkian calcareous glade communities include Cheilanthes feei (slender lip fern), Echinacea simulata (pale purple coneflower), Heliotropium tenellum (pasture heliotrope), Isoetes butleri (limestone quillwort), Oenothera macrocarpa (Missouri evening primrose), and Ophioglossum engelmannii (limestone adder's-tongue).[9] Endemic species of this area include Castilleja kraliana, Dalea cahaba, Liatris oligocephala, Lithospermum decipiens, and Spigelia alabamensis.