Orchid Diversity: from Acacallis to Zygopetalum. This book presents both well-established and extraordinary orchids for cultivation indoors. Following an introduction to the structure, appearance, distribution, and key characteristics of orchids, there is a portrait section organized by botanical genus names. Here, alongside proven beauties, rarer orchids that are somewhat more challenging to cultivate are also featured. A wealth of commercially available and robust species provides inspiration for shopping at plant retailers or nurseries.