Platanthera hookeri (Torr. ex Gray) Lindl.

Hooker's Bog Orchid

Facts About

Accepted Synonym: Habenaria oblongifolia

Platanthera hookeri, also called Hooker's Bog Orchid, is distributed across northeastern Canada and the United States and around the Great Lakes region, from Iowa to Newfoundland. It has two opposite basal leaves and produces an inflorescence of up to 30 yellowish green flowers. The lateral petals are connivent with the dorsal sepal to form a hood over the column, and its acute labellum curves slightly upward. It can be found in dry to mesic forests and woodlands, either deciduous or coniferous, and occasionally in pine barrens.

Platanthera hookeri is globally considered apparently secure, although it is rare or presumed extirpated throughout much of its southern range. When not in flower, it may be confused with P. orbiculata, from which it can usually be distinguished by its absence of stem bracts; when in flower, the two have distinctly different flowers.


This orchid is pollinated by skippers (Hesperidae) and possibly nocturnal moths. The combination of the downward column projecting over the entrance to the spur and the upturned lip is thought to possibly restrict pollen access and forcing the pollinator to approach from a single side and to eventually get pollinia attached to its compound eye as it probes for nectar.

Ecosystem Type

Forests, woodlands


Leaf arrangement:
  • basal
  • opposite
Number of leaves on stem:
Form of the labellum:
the labellum is not pouch-like
Labellum outline:
the labellum is simple
Main color of labellum:
  • green to brown
  • yellow
Nectar spur:
Inflorescence type:
the inflorescence is a raceme
Labellum characteristics:
  • the labellum has a spur
  • the labellum is simple
Labellum length:
8–23 mm
Plant height:
15–45 cm
Show All Characteristics

Native to North America


North American Conservation Status & Distribution

Conservation Status

Select a location to view conservation status:

Conservation and Wetland Status
Global Rank Apparently Secure
US Status N/A
Canadian Status Secure

North America Distribution

Adapted from USDA data