Auricled Twayblade (Neottia auriculata)

2013 © Peter M. Dziuk Photo Credit: 2013 © Peter M. Dziuk

Global Rank: G3 - Vulnerable
Legal Status: N/A
Family: Orchidaceae
State: LB, MB, ME, MI, MN, NB, NF, NH, NY, ON, QC, VT, WI
Nature Serve ID: 157791
Lifeform: Forb/herb
Categories of Interest: Orchids
Date Inducted in National Collection:

Description:

Listera auriculata, officially known as Neottia auriculata, is a small (2-10 inches tall), perennial Orchid typically found in wetlands or moist woods in the Northern USA and Canada. It produces only two large, oval leaves directly beneath a single flowering stalk. It produces 5-20 small green flowers per flowering stalk in late summer. It is considered globally rare, and is listed as critically imperiled (S1), imperiled (S2) or threatened (S3) by NatureServe in most of its known range. It is primarily threatened by logging and changes in hydrology. (Hoy, 2001; NatureServe, 2017; North American Orchid Conservation Center, 2017; USDA and NRCS, 2017)

Where is Auricled Twayblade (Neottia auriculata) located in the wild?

Habitat:

Listera auriculata grows in a variety of cool, moist habitats. In the Northeastern USA it is typically found on forest riverbanks that are occasionally flooded or scoured by ice. It can also be found sandy stream banks, swamps, calcareous alluvium, or sphagnum bogs. (Hoy, 2001)

Distribution:

Listera auriculata occurs in the Eastern portion of Northern North America. Its Western limit is Manitoba and Minnesota. Its Southern limit is Wisconsin and Michigan. As of 2016, its global status was assessed as G3, vulnerable, by NatureServe. At the local level, it is listed as Critically Imperiled (S1) or Imperiled (S2) in about half the states and provinces in which is occurs. Globally, only 61 occurrences have been observed since 1989, but large portions of its range have not been surveyed, so the true number of occurrences is unknown.
(Hoy 2001; NatureServe 2017)

States & Provinces:

Auricled Twayblade can be found in Labrador, Maine, Manitoba, Michigan, Minnesota, New Brunswick, New Hampshire, New York, Newfoundland, Ontario, Quebec, Vermont, Wisconsin

Which CPC Partners conserve Auricled Twayblade (Neottia auriculata)?

Native Plant Trust

Not Sponsored

Assigned 06/09/17

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

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Auricled Twayblade (Neottia auriculata) Characteristics

Nomenclature

Taxon	Neottia auriculata
Authority	(Wiegand) Szlach
Family	Orchidaceae
CPC Number	2641
ITIS	894743
USDA	LIAU2
Duration	Perennial
Common Names	Auricled Twayblade
Associated Scientific Names	Neottia auriculata \| Listera auriculata \| Ophrys auriculata \| Bifolium auriculatum \| Listera auriculata f. trifolia \| Listera borealis f. trifolia
Distribution	Listera auriculata occurs in the Eastern portion of Northern North America. Its Western limit is Manitoba and Minnesota. Its Southern limit is Wisconsin and Michigan. As of 2016, its global status was assessed as G3, vulnerable, by NatureServe. At the local level, it is listed as Critically Imperiled (S1) or Imperiled (S2) in about half the states and provinces in which is occurs. Globally, only 61 occurrences have been observed since 1989, but large portions of its range have not been surveyed, so the true number of occurrences is unknown. (Hoy 2001; NatureServe 2017)

State Rank

State	State Rank
Labrador	S3
Manitoba	S1
Maine	S2
Michigan	S2S3
Minnesota	S1
New Brunswick	S2S3
Newfoundland	S2
New Hampshire	S1
New York	S1
Ontario	S3
Quebec	S3
Vermont	S1
Wisconsin	S1

Ecological Relationships

Photos

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