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• Dichotomous Key
• Poaceae
• Poaceae Group 9
• Schizachyrium
• Schizachyrium littorale

Schizachyrium littorale — dune bluestem

Facts

N/A

Habitat

Coastal beaches (sea beaches), dunes

Characteristics

• Flowers

  Anther number

  2–3

  Awn on glume

  • the glume has an awn
  • the glume has no awn

  Floret lower bract texture

  the lemma is thin and flexible

  Glume relative length

  one or both glumes are as long or longer than all of the florets

  Glume shape

  the glume is flat or curved in cross-section

  Glume veins

  • 1
  • 3
  • 5
  • 7 or more

  Inflorescence arrangement

  the plant has two types of spikelets with different reproductive structures

  Inflorescence axis orientation

  • the inflorescence axis is arched or curved outward
  • the inflorescence axis is straight

  Inflorescence branches

  • the flowers are attached to branches rather than to the main axis of the inflorescence
  • there are no branch points between the base of the inflorescence axis and the flowers, or they are not obvious

  Inflorescence type (general)

  • the inflorescence is a spike, or is spike-like, lacking obvious branches
  • the spikelets are borne on stalks or on branches

  Inflorescence type (specific)

  the inflorescence has pairs (or trios) of spikelets, but with one always either missing a stalk or on a shorter stalk than the other

  Lemma awn base

  • NA
  • the awn is attached right at the tip of the lemma

  Lemma awn length

  0–20 mm

  Lemma awn number

  • the lemma has no awn
  • the lemma has one awn on it

  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 tip

  the lemma tip is split into two or more points

  Lemma vein number

  • 1
  • 3

  One or more florets

  there is one floret per spikelet

  Spikelet axis tip

  there is no extension of the spikelet axis beyond the tip of the spikelet

  Spikelet disintegration

  the spikelet breaks off below the glumes

  Spikelet length

  1.5–10 mm

  Spikelets spiny

  the spikelets do not appear spiny

• Leaves

  Leaf auricles

  the leaves do not have auricles

  Leaf blade width

  3.5–6.5 mm

  Leaf ligule length

  1.5–2 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 hairs

  • there are hairs on the surface of the leaf sheath
  • there are no hairs on the surface of the leaf sheath

• Place

  Habitat

  terrestrial

  New England state

  Connecticut

  Specific habitat

  • dunes
  • sea beaches

• Stem, shoot, branch

  Stem orientation

  the stems trail at the base, but turn upwards at the tips

  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)

New England distribution and conservation status

From the dichotomous key of Flora Novae Angliae