Many species in the genus "Selaginella" also demonstrate dichotomous branching. Some modern authors recognize three generic divisions of "Selaginella"&colon; "Selaginella", "Bryodesma" , and "Lycopodioides" . These two plants form a small clade that is sister to all other "Selaginella" species. There are about 750 known species of "Selaginella". An exception is the rare branching in some "Selaginella" species. Spring inflated the genus "Selaginella" to hold all selaginelloid species four decades later. "Oldenlandia" and "Selaginella" species grow at fumaroles. "Selaginella apoda" megaspores may be dispersed by wind or water. "Selaginella kraussiana" is cultivated for ornamental purposes. A number of "Selaginella" species are popular plants for cultivation, mostly tropical species. In plants, trehalose is seen in sunflower seeds, moonwort, "Selaginella" plants, and sea algae. Under dry conditions, some species of "Selaginella" can survive dehydration. "Selaginella willdenowii" is sometimes spelt incorrectly as "Selaginella willdenovii". Other plants with similar life cycles include "Psilotum", "Lycopodium", "Selaginella" and "Equisetum". "Selaginella lepidophylla" has been used as a herbal medicine.