2018/05 May ORCHIDS Magazine

Ronald Coleman begins a beautifully illustrated three-part series on the cypripediums of the United States and Canada. This series is intended to bring an appreciation of the exquisite beauty of this group of native orchids. In this issue Laura Bonnell completes her four-part series on the Dendrobium bigibbum complex and its hybrids and Synda Nelson discusses Paphiopedilum sanderianum and its spectacular hybrids. These plants aren't small but if you have the space to grow them, their tall inflorescences of multiple flowers are simply stunning.

Rounding out our May issue is an excellent Genus of the Month article by Tom Mirenda on the genus Rhynchostele and Sue Bottom walks us through a very thorough discussion of the use of citric acid pH and alkalinity adjustment of high-alkalinity water sources.

Also in this issue

• Dendrobium bigibbum, Part 4 - Recent Hybridizing Activity
• Paphiopedilum sanderianum
• Book Review - Rare and Exotic Orchids; Their Nature and Cultural Significance
• For the Novice - Citric Acid for High-Alkalinity Water
• Genus of the Month - Rhynchostele
• Judges' Corner - New Multi-Issue Search for Orchids Archives
• New Refugium Botanicum - Lycaste tricolor
• Orchids Illustrated - Vanilla
• Spotlight - Growing Orchids on the Shores of Lake Superior
• The Cypripediums of the United States and Canada, Part 1 - The parviflorum complex