Carnivorous plant often waterlogged, which favours the production of toxic ions such as ammonium, and its pH is an acidic 4 to 5. Ammonium can be used as a source of nitrogen by plants, but its high toxicity means that concentrations high enough to fertilise are also high enough to cause damage. However, the habitat is warm, sunny, constantly moist, and the plant experiences relatively little competition from low growing "Sphagnum" moss. Still, carnivores are also found in very atypical habitats. "Drosophyllum lusitanicum" is found around desert edges and "Pinguicula valisneriifolia" on limestone (calcium-rich) cliffs. In all the studied cases, carnivory allows
Sphagnum cuspidatum branch leaves can sometimes be faintly serrated. "S. cuspidatum" is a dioecious species. The spores produced are 29-38 µm, covered with large papillae on both surfaces, and appear to be covered in small blisters (pusticulate). "S. cuspidatum" can be found on wet humus under forests and on the bases of trees forming a hummock-hollow complex; in or near bogs. Distinguishing "Sphagnum cuspidatum" from "Sphagnum viride" is sometimes difficult as both occur over a similar geographic range and both grow in wet carpets. "Sphagnum cuspidatum" has narrower branch leaves and usually a distinct red tinge at the branch bases within the