Galanthus elwesii Galanthus elwesii Galanthus elwesii (Elwes's snowdrop, greater snowdrop) is one of a number of species of the genus "Galanthus", herbaceous, perennial, bulbous plants belonging to the family Amaryllidaceae. It is a native of the Caucasus. This herbaceous perennial plant grows to about 20–25 cm high. It grows from a globose bulb, 2–3 cm in diameter. It produces two leaves which are obtuse, linear, and blue-green in colour. The flowers are globose, white, pendulous, and 2–3 cm long, and solitary at the tip of a solid, pointed scape. The outer floral tepals are oblanceolate, with shorter inner tepals that are emarginate
Chlamydomonas nivalis optimal position in the snow for moisture content, light, and temperature. When in the immotile cyst stage, the "C. nivalis" cells must depend on the flow of meltwater to move it by chance to a favourable area. The temperatures in which this species can survive in ranges from below 0 °C to just above 20 °C. Growth is slow when temperatures are below 5 °C. At 5-15 °C the growth of "C. nivalis" cells can outperform the growth of C. reinhardtii cells. Both species grow at the same rate at 20-25 °C. The growth of "C. nivalis" is suppressed when