The present investigation was conducted using all vegetatively propagated species and hybrids of commercially grown orchid genera viz. Cattleya Lindl., Cymbidium Sw., Dendrobium Sw., Mokara (Arachnis X Ascocentrum X Vanda), Oncidium Sw., Paphiopedilum Pfitz, Phalaenopsis Blume and Vanda Jones ex R. Br. With the study of morphological diversity of 8 orchid genera, 53 descriptors in Cattleya, 62 descriptors in Cymbidium, 52 descriptors in Dendrobium, 61 descriptors in Mokara, 60 descriptors in Oncidium, 77 descriptors in Paphiopedilum, 58 descriptors in Phalaenopsis and 54 descriptors in Vanda were developed. Amongst different morphological descriptors of commercially grown orchid genera, diversity in pseudobulb shape, leaf shape, inflorescence variation, floral characteristics and their diversity were studied in details.