118 BOTANICAL SOCIETY OF EDINBURGH.  [Szss. Lxrx. 
but the necessity for it does not exist in the perpetual 
summer of the Tropics, as it does in temperate climates, 
with their strongly contrasted seasons in which either a 
cold winter or a hot and arid summer necessitates special 
provision for the safety of the plant. In tropical countries, 
neither bulb nor dormant bulb may be required; and, asa 
matter of fact, no bulbous species are found in those regions, 
with the exception of D. peltata, which ranges from its home 
in Tasmania and Australia to Java, Ceylon, India, and 
southern China. 
