Tetraphis geniculata

Tetraphis geniculata Girg. ex Milde:
Japan (Asia)
Canada (North America)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Global Range: Estimated range 80,000-1,000,000 square miles worldwide. Russian Far East, China, Japan, the Pacific Northwest (Alaska, British Columbia, Idaho, Montana, Oregon, Washington), New England (New Hampshire, Maine), and eastern Canada (New Brunswick, Newfounland, Nova Scotia, Prince Edward Island, Quebec). A reported collection from northern California has not been verified.

Specialized asexual structures are often present. Seta 7-17 mm, erect, geniculate, cells smooth and spiraled below the bend, cells straight and papillose by projecting cell ends above the bend, twisted when dry. Spores 13-16 µm.

Georgia geniculata (Milde) Brockmüller

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 81 - 300

Comments: Estimated 180-200 occurrences worldwide.

The following is a representative barcode sequence, the centroid of all available sequences for this species.

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1

Canada

Rounded National Status Rank: N4 - Apparently Secure

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Estimated 180-200 occurrences worldwide. Estimated 40 occurrences worldwide with good viability. Estimated 2500-10,000 individuals worldwide. Estimated range 80,000-1,000,000 square miles worldwide. Estimated area of occupancy 100-1000 acres worldwide. Long-term trend is a moderate decline of 25-50% and a short-term decline of 10-30%. Moderate, non-imminent threat. Estimated 15-20 occurrences protected worldwide and managed accordingly. Moderately vulnerable. Narrow environmental specificity.

Environmental Specificity: Narrow. Specialist or community with key requirements common.

Global Short Term Trend: Decline of 10-30%

Global Long Term Trend: Decline of 30-50%

Degree of Threat: High - medium

Comments: Moderate, non-imminent threat. Logging and subsequent drying of the understory, coupled with long-term loss of large woody debris in various decay classes and diameters, has reduced the abundance of this species and other more common taxa associated with rotting wood.