Orchidaceae : Monocotyledons

It is  the largest and most evolved family of the flowering plants comprises 25,000 to 35,000 species under 750 to 850 genera [1–3]. They are virtually found in all regions around the globe except the icy Antarctica and hot deserts, but their greatest diversity occurs in the tropical and sub-tropical regions. Orchids are undoubtedly the ornamental elite because of their perplexingly complex flowers of exquisite beauty. Terrestrial species grow from a rhizome, a corm, or a tuber. The stem base in epiphytic species is a pseudobulb. The leaves are simple, alternate, and often fleshy. The inflorescence is a raceme, a spike, or a panicle.