Chapter 1. Introduction
Section I. Subfamily Cypripedioideae (the slipper orchids)
Chapter 2. Cypripedium L. (the lady's-slippers), Introduction
Chapter 3. Section Acaulia
Cypripedium acaule Aiton (pink or stemless lady's-slipper)
Chapter 4. Section Obtusipetala
Cypripedium reginae Walter (showy lady's-slipper)
Cypripedium passerinum Richardson (sparrow's egg lady's-slipper)
Chapter 5. Section Cypripedium
Cypripedium parviflorum Salisbury (yellow lady's-slipper)
Cypripedium candidum Muhlenberg ex Willdenow (small white lady's-slipper)
Cypripedium montanum Douglas ex Lindley (mountain lady's-slipper)
Cypripedium kentuckiense C. F. Reed (ivory lady's-slipper, purloined slipper)
Chapter 6. Sections Arietinum and Enantiopetalum
Arietinum
Cypripedium arietinum R. Brown (ram's head lady's-slipper)
Enantiopetalum
Cypripedium fasciculatum Kellogg ex S. Watson (clustered lady's-slipper)
Chapter 7. Sections Irapeana and Bifolia
Irapeana
Cypripedium californicum A. Gray (California lady's-slipper)
Bifolia
Cypripedium guttatum Swartz (spotted lady's-slipper) and
Cypripedium yatabeanum Makino (green moccasin-flower)
Section II. Subfamily Orchidoideae (Part one)
Tribe Orchideae
Chapter 8. Platanthera L., Introduction
Chapter 9. Limnorchis Group
Platanthera dilatata (Pursh) Lindley ex L. C. Beck (tall white northern bog
orchid), P. aquilonis Sheviak (northern green orchid), and P. huronensis
(Nuttall) Lindley (tall green bog orchid)
Platanthera stricta Lindley (slender bog orchid)
Platanthera sparsiflora (S. Watson) Schlechter (sparsely flowered bog orchid)
Other species of the Limnorchis Group
Chapter 10. Platanthera Group
Platanthera obtusata (Banks ex Pursh) Lindley (blunt-leaved rein orchis)
Platanthera orbiculata (Pursh) Lindley (large round-leaved orchid) and
P. macrophylla (Goldie) P. M. Brown (goldie's round-leaved orchid)
Other species of the Platanthera Group
Chapter 11. Lacera Group
Platanthera peramoena A. Gray (purple fringeless orchid)
Platanthera psycodes (L.) Lindley (small-flowered purple-fringed orchid),
P. grandiflora (Bigelow) Lindley (large-flowered purple-fringed orchid), and
P. lacera (Michaux) G. Don (ragged fringed orchid)
Platanthera praeclara Sheviak and Bowles (western prairie fringed orchid)
and P. leucophaea (Nuttall) Lindley (eastern prairie fringed orchid)
Chapter 12. Blephariglottis Group
Platanthera ciliaris (L.) Lindley (yellow-fringed orchid) and P. blephariglottis
(Willdenow) Lindley (white-fringed orchid)
Other yellow-fringed orchids
Platanthera integrilabia (Correll) Luer (monkey-face orchid)
Platanthera clavellata (Michaux) Luer (little club-spur orchid)
Other possible members of the Blephariglottis Group
Chapter 13. Platantheras of unknown alignment
Platanthera flava (L.) Lindley (tubercled-orchid)
Platanthera chorisiana (Chamisso) Reichenbach (chamisso's orchid)
Chapter 14. Other Orchideae
Piperia Rydberg
Galearis Rafinesque
Pseudorchis Seguier
Amerorchis Hulten
Dactylorhiza Necker ex Nevski
