Orchidaceae - orchid family
Species that grow without cultivation on Mount Desert Island

compiled by the
Champlain Project - P. O. Box 55 - Bass Harbor, Maine  04653

(updated 30 August 2018)

Orchidaceae - orchid family

Mount Desert Island is home to 16 species in 11 genera. Click on a link below or scroll down for more information.
   Arethusa (1 species)
      Arethusa bulbosa - dragon’s-mouth (occasional1)
   Calopogon (1 species)
      Calopogon tuberosus - tuberous grass-pink (occasional)
   Corallorhiza (2 species)
      Corallorhiza maculata - spotted coral-root ([?])
      Corallorhiza trifida - early coral-root (uncommon)
   Cypripedium (1 species)
      Cypripedium acaule - pink lady’s-slipper (occasional)
   Epipactis (1 species)
      Epipactis helleborine - broad-leaved helleborine (uncommon)
   Goodyera (2 species)
      Goodyera pubescens - downy rattlesnake-plantain (rare)
      Goodyera repens - dwarf rattlesnake-plantain (uncommon)
   Malaxis (1 species)
      Malaxis unifolia - green adder’s-mouth (uncommon)
   Neottia (1 species)
      Neottia cordata - heart-leaved twayblade (uncommon)
   Platanthera (4 species)
      Platanthera clavellata - little club-spur orchid (uncommon)
      Platanthera grandiflora - greater purple fringed orchid (uncommon)
      Platanthera lacera - green fringed orchid (rare)
      Platanthera psycodes - lesser purple fringed orchid (uncommon)
   Pogonia (1 species)
      Pogonia ophioglossoides - rose pogonia (uncommon)
   Spiranthes (1 species)
      Spiranthes cernua - nodding ladies’-tresses (uncommon)

Arethusa (dragon’s-mouth)
[information to be added]

Arethusa bulbosa (dragon’s-mouth) - [information to be added]

(click on image to enlarge)

Calopogon (grass-pink)
[information to be added]

Calopogon tuberosus (tuberous grass-pink) - [information to be added]

(click on image to enlarge)

Corallorhiza (coral-root)
[information to be added]

Corallorhiza maculatea (spotted coral-root) - [information to be added]

(click on image to enlarge)

Corallorhiza trifida (early coral-root) - [information to be added]

Cypripedium (lady's-slipper)
[information to be added]

Cypripedium accuse (pink lady's slipper) - [information to be added]
(click on an image to enlarge)

Epipactis (helleborine)
[information to be added]

Epipactis helleborine (broad-leaved helleborine) - [information to be added]
(click on an image to enlarge)

Goodyera (rattlesnake-plantain)
[information to be added]

flowers in inflorescence leaf length leaf width veins
Goodyera pubescens spiraled around axis 4–10 cm 2–4 cm finely white-lined
Goodyera repens on one side of axis 1–4 cm 0.5–2 cm coarsely white-lined

Goodyera pubescens (downy rattlesnake-plantain) - [information to be added]
(click on an image to enlarge)

Goodyera repens (dwarf rattlesnake-plantain) - [information to be added]

Malaxis (adder’s-mouth)
[information to be added]

Malaxis unifolia (green adder’s-mouth) - [information to be added]

Neottia (twayblade)
[information to be added]

Neottia cordata (heart-leaved twayblade) - [information to be added]

Platanthera (fringed orchid)
[information to be added]

plant height raceme width petal color leaf number
Platanthera clavellata {?} 10–40 cm greenish white one well-developed one
Platanthera grandiflora 3–9 cm 50–150 cm magenta-pink {?}
Platanthera lacera {?} 20–80 cm greenish white 3–6
Platanthera psycodes 2.5–4 cm 30–100 cm magenta-pink 2–6

Platanthera clavellata (little club-spur orchid) - [information to be added]

Platanthera grandiflora (greater purple fringed orchid) - [information to be added]

Platanthera lacera (green fringed orchid) - [information to be added]

(click on image to enlarge)

Platanthera psycodes (lesser purple fringed orchid) - [information to be added]

Pogonia (pogonia)
[information to be added]

Pogonia ophioglossoides (rose pogonia) - [information to be added]

Spiranthes (ladies’-tresses)
[information to be added]

Spiranthes cernua (nodding ladies’s-tresses) - [information to be added]

   1Frequency designations are from Mittelhauser, Glen H., Linda L. Gregory, Sally C. Rooney, and Jill E. Webber. 2010. The Plants of Acadia National Park. Orono, Maine: The University of Maine Press.