Galanthus open during snowdrop season for the National Gardens Scheme (NGS) and in Scotland for Scotland's Gardens. Colesbourne Park in Gloucestershire is one of the best known of the English snowdrop gardens, being the home of Henry John Elwes, a collector of Galanthus specimens, and after whom "Galanthus elwesii" is named. Numerous single- and double-flowered cultivars of "Galanthus nivalis" are known, and also of several other "Galanthus" species, particularly "G. plicatus" and "G. elwesii". Also, many hybrids between these and other species exist (more than 500 cultivars are described in Bishop, Davis, and Grimshaw's book, plus lists of many cultivars that
Chlamydomonas nivalis food source. Infections of "C. nivalis" cells by chytrids, "Chytridium chlamydococci", filamentous fungi, and "Selenotila nivalis" have also been observed. As winter approaches, the cells will approach the last stage of their life cycle. The orange cells mature into red cysts, the form in which it will remain for the remainder and longest portion of its life cycle. Cells at this stage are most resistant to harsh environmental conditions. Inorganic and organic materials such as bacteria, fungi, and dust particles coat the mucilage layer of the cell wall. The inorganic impurities were found to be rich in silicon, iron, and