Deschampsia anadyrensis V.N. Vassil.

glaucous hair grass

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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

Glaucous hair grass is a native grass that is quite common in northern New England, and increasingly rare in the southern states. It inhabits rocky and gravelly shores, cliffs and outcrops.

Habitat

Brackish or salt marshes and flats, fresh tidal marshes or flats, ridges or ledges, shores of rivers or lakes

Characteristics

Habitat
  • terrestrial
  • wetlands
New England state
  • Connecticut
  • Maine
  • Massachusetts
  • New Hampshire
  • Rhode Island
  • Vermont
Inflorescence branches
the flowers are attached to branches rather than to the main axis of the inflorescence
Spikelet length
4.5–6 mm
Awn on glume
the glume has no awn
One or more florets
there is more than one floret per spikelet
Lemma awn length
2–3 mm
Leaf sheath hair type
there are no hairs on the surface of the leaf sheath
Leaf ligule length
2–7 mm
Show All Characteristics
  • Flowers
    Anther number
    3
    Awn on glume
    the glume has no awn
    Bristles below spikelets
    no
    Floret lower bract texture
    the lemma is thin and flexible
    Floret number
    2–3
    Floret types within spikelet
    all the florets within a spikelet are similar
    Glume awn length
    0 mm
    Glume shape
    the glume is V-shaped in cross-section
    Glume veins
    1
    Glumes per spikelet
    2
    Inflorescence arrangement
    the spikelets are uniform
    Inflorescence axis orientation
    • the inflorescence axis is arched or curved outward
    • the inflorescence axis is straight
    Inflorescence branch roughness
    the inflorescence branches are somewhat to very rough
    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 spread out, with clearly-evident branches
    Inflorescence length
    20–220 mm
    Inflorescence length to width ratio
    0.4–2.2
    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
    Inflorescence width
    50–100 mm
    Inforescence position
    the spikelets are mainly carried at the end of the stem
    Lemma awn base
    • the awn is attached at the lower half of the lemma (it emerges from near the base of the lemma)
    • the awn is attached at the upper half of the lemma
    Lemma awn coiled
    the lemma awn is straight or twisted, but not coiled one half turn
    Lemma awn length
    2–3 mm
    Lemma awn number
    the lemma has one awn on it
    Lemma awn orientation
    the awn of the lemma is straight
    Lemma base hairs
    the lemma has hairs at the base
    Lemma cross-section
    the lemma is flat or rounded if you cut across the midpoint
    Lemma hairs
    the lemma is hairless between the veins
    Lemma keel hairs
    NA
    Lemma marginal vein hairs
    the marginal vein of the lemma is hairless
    Lemma surface
    the surface of the lemma is relatively smooth (not counting any longitudinal veins or hairs)
    Lemma tip shape
    the lemma tip is rounded off or truncate (ends abruptly in a more or less straight line as though cut off); it may or may not also have an awn or teeth at the tip
    Lemma vein number
    5
    Lemma vein orientation
    the veins on the lemma stay roughly parallel throughout
    Lower glume relative length
    the lower glume is nearly as long, or as long as, the upper glume
    One or more florets
    there is more than one floret per spikelet
    Palea length
    1.8–2.6 mm
    Palea relative length
    palea is one half to fully as long as lemma
    Reproductive system
    all the flowers on the plant have both carpels and stamens (synoecious)
    Spikelet axis tip
    there is an extension of the spikelet axis beyond the tip of the spikelet
    Spikelet disintegration
    the spikelet breaks off above the glumes, so that after the florets fall off, the glumes remain
    Spikelet length
    4.5–6 mm
    Spikelet number per node
    Up to 0
    Spikelet pedicel
    the spikelets have pedicels
    Spikelet position
    the spikelets emerge mainly from the upper halves of the inflorescence branches
    Spikelet width
    2–3 mm
    Spikelets spiny
    the spikelets do not appear spiny
    Tip of glume
    the tip of the glume is not divided (though it may have an awn on it)
    Upper glume relative length
    the upper glume is more than one half as long as the lowest lemma
    Upper glume shape
    the upper glume is widest at or below the middle
  • Growth form
    Horizontal rooting stem
    no
    Lifespan
    the plant lives more than two years
    Rhizomes
    no
    Roots
    there are only slender roots on the plant
  • Leaves
    Basal leaves
    the plant has large or prominent tufts of leaves at the base of the flowering stem
    Leaf auricles
    the leaves do not have auricles
    Leaf basal lobe hairy
    NA
    Leaf blade hairs
    the leaf blade is hairless, but it may have tiny prickles that give it a sand-papery feel
    Leaf blade length
    1–8 cm
    Leaf blade texture
    the leaf blade is rough and sandpapery
    Leaf ligule length
    2–7 mm
    Leaf ligule type
    the leaf ligule is in the form of a membrane
    Leaf margin glands
    there are no glands along the edges of the leaf blade
    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 color and persistence
    the leaf sheathes are off-white to light-brown and mostly persist in older leaves
    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
    • Connecticut
    • Maine
    • Massachusetts
    • New Hampshire
    • Rhode Island
    • Vermont
    Specific habitat
    • brackish or salt marshes and flats
    • fresh tidal marshes or flats
    • ridges or ledges
    • shores of rivers or lakes
  • Stem, shoot, branch
    Hairs at nodes
    the stem nodes are hairless or they have very sparse hairs
    Plant height
    7–75 cm
    Roots at lower stem nodes
    no
    Stem hairs
    the stem is nearly to completely hairless
    Stem orientation
    the stems are upright
    Stem spacing
    the stems grow close together in compact clusters or tufts
    Stem thickness at base
    1–2.5 mm

Wetland Status

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

New England Distribution and Conservation Status

Distribution

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

Conservation Status

None

Native to North America?

Yes

Sometimes Confused With

Graphephorum melicoides:
awn attached below the middle of the lemma, and lemma apex entire to bifid (vs. D. anadyrensis, with the awn attached above the middle of the lemma and lemma apex bifid).
Danthonia cespitosa:
lower stem leaveswith blades 15-50 cm long and ligules mostly 5-10 mm long, and stems 2-6 mm thick near the base (vs. D. anadyrensis, with lower stem leaves with blades 1-8 cm long and ligules mostly 3-4 mm long, and stems 1-2.5 mm thick near the base).

Synonyms

  • Deschampsia cespitosa (L.) Beauv. ssp. glauca (Hartman) Hartman
  • Deschampsia cespitosa (L.) Beauv. var. glauca (Hartman) Lindm. f.
  • Deschampsia glauca Hartman

Family

Poaceae

Genus

Deschampsia

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Information from Dichotomous Key of Flora Novae Angliae

1.  Deschampsia anadyrensis V.N. Vassil. N

glaucous hair grass. Deschampsia cespitosa (L.) Beauv. ssp. glauca (Hartman) Hartman; D. cespitosa (L.) Beauv. var. glauca (Hartman) Lindm. f.; D. glauca Hartman • CT, MA, ME, NH, RI, VT; more common in the northern states and becoming rare in southern New England. Rocky and gravelly shorelines, river shore cliffs and outcrops. Morphological review of museum specimens indicates that what has been called Deschampsia glauca (or its various nomenclatural synonyms) in New England is not the same as that from Sweden (where the type of Deschampsia glauca is from; David Murray, personal communication). The name 
 D. anadyrensis may be the appropriate name for our taxon, based on a type from Russia. Though more work is needed to confirm the appropriate epithet for our taxon, it is known 
that the epithet “ glauca” is not correct.