Carex scabrata Schwein.

eastern rough sedge

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New England Distribution

Adapted from BONAP data

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North America Distribution

Adapted from BONAP data

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Facts About

Eastern rough sedge has distinctly rough leaf edges and upper surfaces.

Habitat

Forests, shores of rivers or lakes, swamps

Characteristics

Habitat
  • terrestrial
  • wetlands
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont
stem leaf blade width
4–12 mm
Lowest bract sheath
the lowest bract has no sheath (or a very short sheath up to four millimeters in length)
Spike on stalk
the lowest spike on the plant has a peduncle
Top spike
  • the uppermost spike contains both staminate and carpellate flowers, with the staminate flowers located below the carpellate flowers
  • the uppermost spike contains only staminate flowers
Perigynium hairs
the perigynium is hairy
Perigynium length
3.4–4.5 mm
Leaf sheath color
the leaf sheath has no pink, red or purple tinting
Leaf blade texture
the leaf blade is smooth and hairless, or rough and sandpapery
Perigynium beak teeth
the perigynium beak is not divided at the tip into two teeth, or the teeth are very tiny
Show All Characteristics
  • Flowers
    Bumps on fruit
    there are no papillae on the perigynium surface
    Length of scale
    • the scale is nearly as long as, or longer than, the perigynium
    • the scale is shorter than the perigynium
    Lowest spike length
    10–70 mm
    Lowest spike width
    5.5–9 mm
    Perigynium beak
    the perigynium has a beak
    Perigynium beak length
    1.3–1.9 mm
    Perigynium beak orientation
    the beak of the perigynium is curved, or angled out from the perigynium
    Perigynium beak serrations
    the perigynium beak has no serrations
    Perigynium beak teeth
    the perigynium beak is not divided at the tip into two teeth, or the teeth are very tiny
    Perigynium beak teeth length
    0.1–0.8 mm
    Perigynium color
    green
    Perigynium cross-section
    • the perigynium is relatively round in cross-section
    • the perigynium is trigonous (triangular) in cross-section
    Perigynium hairs
    the perigynium is hairy
    Perigynium length
    3.4–4.5 mm
    Perigynium nerve number
    6–8
    Perigynium nerve texture
    the nerves on the perigynium are raised, even after drying the perigynium
    Perigynium nerves lower side
    3–4
    Perigynium nerves upper side
    3–4
    Perigynium orientation
    • the perigynia are angled outwards
    • the perigynia are oriented vertically or pressed against the axis or adjacent perigynia
    Perigynium puffy
    the perigynium is inflated (there is space between the perigynium and the achene)
    Perigynium shape
    the perigynium body is obovate (egg-shaped, but with the widest point above the middle of the leaf blade)
    Perigynium winged
    the perigynium has no wings
    Pollen- and seed-producing spikes
    some of the spikes produce perigynia
    Pollen-producing spike length
    15–50 mm
    Pollen-producing spike number
    1
    Scale awn
    • The carpellate scale does not have an awn (it may have a short point)
    • the carpellate scale has an awn on it
    Scale awn texture
    • NA
    • the carpellate scale awn does not have teeth (it may or may not have hairs)
    • the carpellate scale awn has tiny teeth
    Scale color
    • green
    • white or translucent
    Scale tip
    • the carpellate scale tip is acuminate (tapered to a narrow point)
    • the carpellate scale tip is acute (has a sharp point)
    Spike on stalk
    the lowest spike on the plant has a peduncle
    Spike orientation
    the spikes are oriented vertically or pressed against the axis
    Spikes per stem
    2-15
    Stigma branching
    the stigmas have three branches
    Top spike
    • the uppermost spike contains both staminate and carpellate flowers, with the staminate flowers located below the carpellate flowers
    • the uppermost spike contains only staminate flowers
  • Fruits or seeds
    Achene dimples
    the achene has no folds or dimples
    Achene length
    1.8–2.3 mm
    Achene width
    1.2–1.5 mm
    Style persistence
    the style falls off the mature achenes
  • Growth form
    Rhizomes
    there are long rhizomes present
  • Leaves
    Leaf arrangement
    the leaves are all produced from the base of the plant
    Leaf blade cross-section
    the leaf blade is flat or M-shaped, with two prominent side-veins
    Leaf blade length to width ratio
    25–33
    Leaf blade texture
    the leaf blade is smooth and hairless, or rough and sandpapery
    Leaf bumps
    the upper surface of the leaf blade does not have papillae
    Leaf sheath bumps
    there are no papillae at the top edge of the leaf sheath
    Leaf sheath color
    the leaf sheath has no pink, red or purple tinting
    Leaf sheath dots
    there are no dots on the leaf sheathes
    Leaf sheath folds
    there are no corrugations on the leaf sheath
    Leaf sheath texture
    the leaf sheath feels smooth, and has no hairs
    Ligule length
    11–53 mm
    Lowest bract sheath
    the lowest bract has no sheath (or a very short sheath up to four millimeters in length)
    Lowest leaf blade width
    4–18 mm
    Lowest leaf sheath texture
    the leaf sheath feels smooth (it may have soft hairs)
    stem leaf blade width
    4–12 mm
  • Place
    Habitat
    • terrestrial
    • wetlands
    New England state
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Rhode Island
    • Vermont
    Specific habitat
    • forests
    • shores of rivers or lakes
    • swamps
  • Stem, shoot, branch
    Plant height
    30–90 cm
    Relative stem height
    • the main stem is equal to or shorter than the leaves
    • the main stem is taller than the leaves
    Stem cross-section
    the main stem has all three edges raised to narrow wing-like ridges
    Stem spacing
    the stems grow close together in compact clusters or tufts

Wetland Status

Occurs only in wetlands. (Wetland indicator code: OBL)

New England Distribution and Conservation Status

Distribution

Connecticut
present
Maine
present
Massachusetts
present
New Hampshire
present
Rhode Island
present
Vermont
present

Conservation Status

Exact status definitions can vary from state to state. For details, please check with your state.

Massachusetts
fairly widespread (S-rank: S4S5)

Native to North America?

Yes

Family

Cyperaceae

Genus

Carex

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Information from Dichotomous Key of Flora Novae Angliae

14.  Carex scabrata Schwein. N

eastern rough sedge. CT, MA, ME, NH, RI, VT. Low, wet areas in forests, stream shores, and seeps.