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Muhlenbergia richardsonis — matted muhly

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Facts

Matted muhly is a rare native found only on ice-scoured riversides, river shore ledges and cobbles in areas of high-pH bedrock in northern Maine.

Habitat

Shores of rivers or lakes

New England distribution

Adapted from BONAP data

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North America distribution

Adapted from BONAP data

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Characteristics

Habitat
  • terrestrial
  • wetlands
New England state
Maine
Leaf blade width
0.5–2 mm
Inflorescence branches
the flowers are attached to branches rather than to the main axis of the inflorescence
Spikelet length
1.7–3.1 mm
Glume relative length
neither glume is quite as long as all of the florets
Awn on glume
the glume has an awn
One or more florets
there is one floret per spikelet
Lemma awn length
0–0.5 mm
Leaf sheath hair type
there are no hairs on the surface of the leaf sheath
Leaf ligule length
0.8–3 mm
Anther length
0.9–1.6 mm
Show all characteristics
  • Flowers

    Anther length
    0.9–1.6 mm
    Anther number
    3
    Awn on glume
    the glume has an awn
    Floret lower bract texture
    the lemma is thin and flexible
    Glume relative length
    neither glume is quite as long as all of the florets
    Glume veins
    • 1
    • 3
    Inflorescence arrangement
    the spikelets are uniform
    Inflorescence axis orientation
    the inflorescence axis is straight
    Inflorescence branches
    the flowers are attached to branches rather than to the main axis of the inflorescence
    Inflorescence crowding
    the panicle is somewhat to very congested (crowded), and the branches may not be clearly seen without close inspection
    Inflorescence length
    10–150 mm
    Inflorescence type (general)
    the spikelets are borne on stalks or on branches
    Inflorescence type (specific)
    the inflorescence is branched, and the branches do NOT both grow from the same side of the plant AND look like spikes
    Lemma awn base
    the awn is attached right at the tip of the lemma
    Lemma awn length
    0–0.5 mm
    Lemma awn number
    • the lemma has no awn
    • the lemma has one awn on it
    Lemma base hairs
    the lemma is hairless or feels just a tiny bit rough at the base
    Lemma cross-section
    the lemma is flat or rounded if you cut across the midpoint
    Lemma surface
    the surface of the lemma is relatively smooth (not counting any longitudinal veins or hairs)
    Lemma vein number
    3
    One or more florets
    there is one floret per spikelet
    Palea relative length
    palea is one half to fully as long as lemma
    Spikelet axis tip
    there is no extension of the spikelet axis beyond the tip of the spikelet
    Spikelet length
    1.7–3.1 mm
    Spikelets spiny
    the spikelets do not appear spiny
    Upper glume shape
    the upper glume is widest at or below the middle
  • Leaves

    Leaf auricles
    the leaves do not have auricles
    Leaf blade cross-section
    the leaf blade is clearly folded or rolled inwards
    Leaf blade width
    0.5–2 mm
    Leaf ligule length
    0.8–3 mm
    Leaf ligule type
    the leaf ligule is in the form of a membrane
    Leaf sheath closed around stem
    the margins of the leaf sheath are overlapping and not fused together except in the basal half (or less)
    Leaf sheath hair type
    there are no hairs on the surface of the leaf sheath
    Leaf sheath hairs
    there are no hairs on the surface of the leaf sheath
  • Place

    Habitat
    • terrestrial
    • wetlands
    New England state
    Maine
    Specific habitat
    shores of rivers or lakes
  • Stem, shoot, branch

    Stem spacing
    • the stems grow close together in compact clusters or tufts
    • the stems grow singly or a few together (they may form diffuse colonies)

Wetland status

Usually occurs in wetlands, but occasionally in non-wetlands. (Wetland indicator code: FACW)

In New England

Distribution

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

Conservation status

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

Maine
uncommon (S-rank: S3), special concern (code: SC)

From Flora Novae Angliae dichotomous key

7.  Muhlenbergia richardsonis (Trin.) Rydb. NC

matted muhly. Muhlenbergia squarrosa (Trin.) Rydb. • ME. Ice-scoured river shores, river shore ledges and cobble pavement, in regions of high-pH bedrock or till.

Native to North America?

Yes

Sometimes confused with

Muhlenbergia schreberi

Family

Poaceae

Genus

Muhlenbergia