Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at a standard conditions that sublimes readily to form a violet gas. The elemental form was discovered by the French chemist Bernard Courtois in 1811.
Definition of CHOLLA. : any of numerous shrubby opuntias chiefly of the southwestern United States and Mexico that have needlelike spines partly enclosed in a papery sheath and cylindrical joints âcalled also cholla cactus.
The cactus and succulent plant mall (CSPM) is an Internet resource for all growers of cacti and succulents. It is regularly updated with information on cactus and succulent societies and suppliers of plants, seeds and literature on cacti and succulents. The CSPM has developed and hosts webpages for cactus and succulent organisations worldwide (230 domains + 52 web sites within cactus-mall.com + 131 advertisers). It also aims to maintain as complete a list of web pages and other cactus and succulent related Internet facilities as possible.