The May isssue features the completion (for now) of the series by Arthur E. and A.A. Chadwick First Ladies and Their Cattleyas with the story of Rhyncholaeliocattleya Jill Biden and Stig Dalström continues his series on the Orchids of Bhutan with a discussion of the Phalaenopsis found there. Ever wonder how old this plant family we are so enamored with is? You won't want to miss the article by Jen Schmidt on the origins and diversification of these fascinating plants. Rounding out our May issue, Landy Rita Rajaovelona, Larry Sexton and Franck Rakatonasolo report on eight threatened orchids of the Itremo Massif Protected Area of the Central Highland Plateau of Madagascar and their conservation status.

Rounding out our May issue

• Tom's Monthly Checklist
• Orchid Places - Arthur E. Chadwick reports on the orchids of the Denver Botanic Gardens
• Genus of the Month - Disa by Thomas Mirenda
• The New Refugium Botanicum - Dendrobium (Diplocaulobium) lageniforme by Isler F. Chincilla and Franco Pupulin
• Collector's Item - Cattleya elongata by Judith Rapacz-Hasler and Spiro Kasomenakis
• Orchids Illustrated - Women Illustrators: Harriett Ann Thisleton-Dyer by Wesley Higgins and Peggy Alrich
• The 2021 Japan Grand Prix International Orchid and Flower Show by Clare Hermans, Johan Hermans and Makiko Sato