Corallorhiza mertensiana Bong.
Mertens' Coral Root, Pacific Coral Root, Western Coral Root
Facts About
Accepted Synonyms: Corallorhiza maculata subsp. mertensiana, Corallorhiza purpurea, Corallorhiza vancouveriana, Neottia mertensiana
Corallorhiza mertensiana, the Western Coral Root, ranges from southeast Alaska through British Columbia to northern California, and east to Montana and Wyoming. This leafless orchid forms clumps in moist coniferous forests and mixed woods and produces a reddish, slender raceme with up to 40 flowers. The labellum of the showy flowers ranges in color from red-purple, white, or white with purple streaks or spots. This orchid can be distinguished from other coral roots by the serrate margin on the labellum and the prominent mentum protruding backward along the ovary.
Corallorhia mertensiana is considered globally secure and may be abundant throughout the Pacific northwest.
Pollination
Pollinator information for this orchid has not been reported.
Notes on Subspecies and Varieties
C. mertensiana has two color variants that may be found in parts of its range.
Corallorhiza mertensiana forma albolabia, has sepals and petals that are pale yellow to white and the lip is pure white.
Corallorhiza mertensiana forma pallida has sepals and petals that are pale lavender and the lip is bright purple and white.
Ecosystem Type
Forests
Characteristics
- Habitat:
- terrestrial
- Leaf arrangement:
- this plant has no leaves
- Number of leaves on stem:
- absent
- Form of the labellum:
- the labellum is not pouch-like
- Labellum outline:
- the labellum is lobed
- Main color of labellum:
-
- crimson
- white
- Nectar spur:
- absent
- Inflorescence type:
- the inflorescence is a raceme
- Labellum characteristics:
- the labellum is lobed
- Labellum length:
- 4.8–9.5 mm
- Sepal length:
- 6–12 mm
- Plant height:
- Up to 60 cm
-
Flowers
- Floral bract length:
- Up to 2 mm
- Flower petal color:
-
- purple
- yellow
- Flower symmetry:
- the flower is zygomorphic
- Flowering date:
-
- May
- June
- July
- August
- Flowers per inflorescence:
- 8–40
- Form of the labellum:
- the labellum is not pouch-like
- Hairs on inflorescence axis:
- the inflorescence stem is hairless
- Inflorescence length:
- 350–650 mm
- Inflorescence type:
- the inflorescence is a raceme
- Inflorescence width:
- 15–40 mm
- Labellum characteristics:
- the labellum is lobed
- Labellum length:
- 4.8–9.5 mm
- Labellum outline:
- the labellum is lobed
- Labellum position:
- the flowers are resupinate
- Lower petal strongly red-veined:
- no
- Main color of labellum:
-
- crimson
- white
- Nectar spur:
- absent
- Number of stamens:
- 1
- Orientation of side petals:
-
- the lateral petals are ascending
- the lateral petals are spreading
- Pollen sacs:
- the pollinia remain intact and do not fragment into smaller parts
- Self-pollinating flowers:
- there are no cleistogamous flowers
- Sepal length:
- 6–12 mm
- Sepals fused only to sepals:
- the sepals are separate from one another
- Spots on labellum:
- yes
-
Fruits or seeds
- Fruit length:
- 10–25 mm
- Fruit width:
- 6–9 mm
-
Growth form
- Plant height:
- Up to 60 cm
- Roots:
- the rhizomes are coralloid
- Underground organs:
- this plant has a rhizome
- myco-heterotrophic or not:
- the plant is achlorophyllous
-
Leaves
- Bract relative length:
- the bract is shorter than the associated flower
- Leaf arrangement:
- this plant has no leaves
- Number of leaves on stem:
- absent
-
Place
- Ecosystem type:
- forests
- Habitat:
- terrestrial
- Location:
-
- Alaska
- British Columbia
- California
- Montana
- Oregon
- Washington
- Wyoming
-
Facts and Uses
- Mycorrhiza
- Monitoring
- Propagation
- Restoration
Native to North America
Yes
North American Conservation Status & Distribution
Conservation Status
Conservation and Wetland Status | |
---|---|
Global Rank | Apparently Secure |
US Status | N/A |
Canadian Status | Secure |
Conservation status for: Alaska | |
---|---|
Global Rank | Apparently Secure |
US Status | N/A |
Alaska Rank | Apparently Secure |
Alaska Status | N/A |
Canadian Status | Secure |
Wetland Status | N/A |
Conservation status for: British Columbia | |
---|---|
Global Rank | Apparently Secure |
US Status | N/A |
British Columbia Rank | Secure |
British Columbia Status | N/A |
Canadian Status | Secure |
Wetland Status | N/A |
Conservation status for: Wyoming | |
---|---|
Global Rank | Apparently Secure |
US Status | N/A |
Wyoming Rank | State Rare |
Wyoming Status | N/A |
Canadian Status | Secure |
Wetland Status | Upland |