The herbaceous layer is extremely diverse and home to several species considered rare, endangered, threatened or critically imperiled by one or more agencies.[8] Many species found in rocklands throughout south Florida are restricted to individual plots or to specific regions due to changes in soil type, extreme fragmentation, and fire suppression. Most plants are fire-adapted and depend on frequent burning to limit shading and increased humidity from encroaching hardwood species. Grasses and sedges including Andropogon spp., Schizachyrium spp., Muhlenbergia capillaris, Arsitida purpurascens, and Rhynchospora spp. dominate the landscape. Flowering species include Croton linearis, Pinguicula pumilla, Angadenia berteroi, Amorpha herbacea var. crenulate, and a number of different Euphorbia spp.