Monocot Herbs
Fimbristylis autumnalis
Slender fimbry
NATIVE
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Narrow, basal, linear leaves
Credit: Reuven Martin (iNaturalist). Used with permission.
 
 
 
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Coefficient of Conservatism Values (more info)
Mountains
4
Piedmont
3
Coastal Plain
3
National Wetland Plant List Status (more info)
Eastern Mountains/Piedmont
FACW
Coastal Plain
OBL

FIELD ID CHARACTERISTICS:

With this densely clumping grass, look for loose branching clusters of small seeds at tips of flattened stems.

Synonym(s): Fimbristylis geminata, Scirpus autumnalis

Description: Small clumping annual, with stems holding loose clusters of seeds extending out beyond the leaves; 15 to 20 cm tall.

Leaves: Blade leaves relatively short, with much longer flowering stems emerging beyond blades. Flowering stems are flattened.

Flowers/Fruit: Seedheads, without bristles, very small and cone-shaped, on numerous airy branching panicles. Seeds are three-sided. Flowering and fruiting June to October.

Habit and Range: Found statewide in moist to wet soil of any type; meadows, ditches, damp or wet disturbed areas, freshwater shorelines.

Typical Max Plant Height (m):
0.2
Leaf Arrangement:
Basal   
Leaf Division:
Simple   
Leaf Margin:
Entire   
Leaf Shape:
Linear   
Inflorescence Color:
Brown   
Fruit Color:
Brown   
Lifespan:
Annual
Group:
Monocot
Family:
Cyperaceae / Sedge
Ecoregions Found In:
Statewide


COMMON CONFUSIONS:

Both Fimbristylis castanea (marsh fimbry) (which is much larger) and Fimbristylis autumnalis (slender fimbry) (which is much smaller) are relatively common within their range. Other Fimbristylis species occurring in North Carolina are uncommon to very rare. Some are not native.

Click here to view Fimbristylis castanea.

Link to side-by-side comparisons page