Which plant consists of more species and is native to over 7 different countries, Arachnis or Callistephus?
Arachnis (plant) The genus Arachnis, abbreviated as Arach in horticultural trade, (scorpion orchid,) is a member of the Orchid family (Orchidaceae), consisting of more than 20 species native to China, India, Southeast Asia, Indonesia, the Philippines, New Guinea, and the Solomon Islands.
International Society of Arachnology The International Society of Arachnology (ISA) promotes the study of arachnids and the exchange of information among researchers in this field.It acts as an umbrella organisation for regional societies and individuals interested in spiders, and related animals, and organises an "International Congress" every three years.