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Luzula parviflora (Ehrh.) Desv.

small-flowered wood rush

New England Distribution

Adapted from BONAP data

Where native and non-native distributions co-occur in a county, only the native distribution is shown.

North America Distribution

Adapted from BONAP data

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Facts About

Small-flowered wood rush is a circumboreal species, found in boreal and subalpine habitats in New England. Research has shown that seeds have great longevity in the soil, and may survive in the seed bank for centuries.

Habitat

Alpine or subalpine zones, anthropogenic (man-made or disturbed habitats), shores of rivers or lakes

Characteristics

Habitat
  • terrestrial
  • wetlands
New England state
  • Maine
  • Massachusetts
  • New Hampshire
  • Vermont
Stem shape in cross-section
the stem is round or oval in cross-section
Leaf blade width
3–10 mm
Leaf blade cross-section
the leaf blade is flat or rolled in at the edges
Inflorescence position
the inflorescence is at the tip of the plant
Inflorescence branching
the inflorescence is branched
Fruit type (general)
the fruit is a capsule, with at least three seeds in it
Fruit length
2–2.7 mm
Leaf position on plant
  • some leaf attachment points are above the midpoint of the stem
  • the attachment points of all the leaves are at or near the base of the plant
Perianth composition
the perianth is green or brown, with six sepal-like parts, and a leafy texture
Fruit cross-section
the fruit is triangular to terete (circular) in cross-section
Show All Characteristics
  • Flowers
    Floral bristle color
    NA
    Floral bristle number
    NA
    Floral bristle relative length
    NA
    Floral bristles
    NA
    Flower number per cluster
    • 1
    • 2-5
    Inflorescence bract angle
    the bracts are vertical or angled only slightly outwards
    Inflorescence bract number
    there are two to five bracts per inflorescence
    Inflorescence bract position (Sparganium)
    NA
    Inflorescence bracts
    there are at least two bracts, and they are either flat or folded or rolled in at the edges
    Inflorescence branching
    the inflorescence is branched
    Inflorescence crowding
    the inflorescence is at least somewhat spread out, with at least one branch coming from the main stem
    Inflorescence position
    the inflorescence is at the tip of the plant
    Inflorescence type
    there are two or more flowers, spikes or flower clusters on a branched inflorescence
    Perianth composition
    the perianth is green or brown, with six sepal-like parts, and a leafy texture
    Stamen number
    4-6
    Stigma number
    3
    Style division
    the top two thirds of the style is divided
    floral bristle barbs
    NA
  • Fruits or seeds
    Achene beak length
    0 mm
    Achene surface texture
    NA
    Achene tubercle relative width
    NA
    Achene tubercle width
    0 mm
    Capsule relative length
    • the capsule is about equal to the perianth
    • the capsule is longer thant he perianth
    Fruit cross-section
    the fruit is triangular to terete (circular) in cross-section
    Fruit length
    2–2.7 mm
    Fruit type (general)
    the fruit is a capsule, with at least three seeds in it
    Fruit type (specific)
    the fruit is a capsule (splits along two or more seams, apical teeth or pores when dry, to release two or more seeds)
    Locules in capsule
    the capsule has one locule
    Seed length
    1.1–1.5 mm
    Seed tail relative length
    At least 3627 mm
    Seed tails
    there is no tail on the seeds
    Tubercle height
    0 mm
  • Growth form
    Lifespan
    the plant lives more than two years
    Underground organs
    the plant has a rhizome (a horizontal underground stem with roots growing from it)
  • Leaves
    Auricle length
    0 mm
    Auricle texture
    NA
    Auricles
    there are no auricles on the leaf sheath
    Leaf blade cross-section
    the leaf blade is flat or rolled in at the edges
    Leaf blade length
    70–170 mm
    Leaf blade width
    3–10 mm
    Leaf form
    all the leaves hold their form out of water
    Leaf position on plant
    • some leaf attachment points are above the midpoint of the stem
    • the attachment points of all the leaves are at or near the base of the plant
    Leaf septa
    the leaf blades do not have transverse septa
    Leaf sheath hairs
    the leaf sheathes have hairs on them
    Pedicel length (Typha)
    0 mm
    Stem leaf blades
    there are fully-developed leaves with leaf blades on the main stem
    Width of seed-producing inflorescence
    40–120 mm
  • Place
    Habitat
    • terrestrial
    • wetlands
    New England state
    • Maine
    • Massachusetts
    • New Hampshire
    • Vermont
    Specific habitat
    • alpine or subalpine zones
    • man-made or disturbed habitats
    • shores of rivers or lakes
  • Stem, shoot, branch
    Plant height
    20–100 cm
    Stem shape in cross-section
    the stem is round or oval in cross-section

Wetland Status

Occurs in wetlands or non-wetlands. (Wetland indicator code: FAC)

New England Distribution and Conservation Status

Distribution

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

Conservation Status

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

Massachusetts
unranked (S-rank: SNR)
Vermont
rare to uncommon (S-rank: S2S3)

ssp. melanocarpa

Massachusetts
extremely rare (S-rank: S1), endangered (code: E)

ssp. parviflora

Massachusetts
unranked (S-rank: SNR)

Native to North America?

Yes

Sometimes Confused With

Luzula acuminata
Luzula luzuloides

Family

Juncaceae

Genus

Luzula

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Information from Dichotomous Key of Flora Novae Angliae

9.  Luzula parviflora (Ehrh.) Desv. ssp. melanocarpa (Michx.) Hämet-Ahti N

small-flowered wood rush. Juncus melanocarpus Michx.; Luzula melanocarpa (Michx.) Desv.; 
 L. parviflora (Ehrh.) Desv. var. melanocarpa (Michx.) Buch. • MA, ME, NH, VT. Stream shores, gullies, mossy areas, and trail sides in boreal and subalpine areas.