Bouteloua rigidiseta (Steud.) A.S. Hitchc.

Texas grama

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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

Texas grama is a small bunchgrass native to Texas, Oklahoma and Mexico, and a dominant species in some short-grass communities of central Texas. It is a rare tourist in New England, having been collected only in Massachusetts.

Habitat

Anthropogenic (man-made or disturbed habitats)

Characteristics

Habitat
terrestrial
New England state
Massachusetts
Leaf blade width
1–2 mm
Inflorescence branches
the flowers are attached to branches rather than to the main axis of the inflorescence
Spikelet length
2.5–4 mm
Glume relative length
  • both glumes are as long or longer than all of the florets
  • 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 more than one floret per spikelet
  • there is one floret per spikelet
Lemma awn length
0–2 mm
Show All Characteristics
  • Flowers
    Anther number
    3
    Awn on glume
    the glume has an awn
    Floret lower bract texture
    the lemma is thin and flexible
    Floret types within spikelet
    there are at least two distinct forms of florets within one spikelet
    Glume relative length
    • both glumes are as long or longer than all of the florets
    • neither glume is quite as long as all of the florets
    Glume veins
    1
    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 length
    30–60 mm
    Inflorescence type (general)
    the spikelets are borne on stalks or on branches
    Inflorescence type (specific)
    the inflorescence is branched and the branches all 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 coiled
    the lemma awn is straight or twisted, but not coiled one half turn
    Lemma awn length
    0–2 mm
    Lemma awn number
    • the lemma has more than one awn on it
    • the lemma has no awn
    Lemma cross-section
    the lemma is V-shaped 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
    Lower glume length
    3–4 mm
    One or more florets
    • there is more than one floret per spikelet
    • 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
    2.5–4 mm
    Spikelets spiny
    the spikelets do not appear spiny
    Tip of glume
    • the tip of the glume is divided into two or more points
    • the tip of the glume is not divided (though it may have an awn on it)
  • Growth form
    Lifespan
    the plant lives more than two years
  • Leaves
    Leaf auricles
    the leaves do not have auricles
    Leaf blade width
    1–2 mm
    Leaf ligule type
    the leaf ligule is in the form of a membrane with fine hairs
    Leaf sheath closed around stem
    the margins of the leaf sheath are overlapping and not fused together except in the basal half (or less)
  • Place
    Habitat
    terrestrial
    New England state
    Massachusetts
    Specific habitat
    man-made or disturbed habitats
  • Stem, shoot, branch
    Stem spacing
    the stems grow close together in compact clusters or tufts

Wetland Status

Not classified

New England Distribution and Conservation Status

Distribution

Connecticut
absent
Maine
absent
Massachusetts
present
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.

Massachusetts
unranked (S-rank: SNR)

Native to North America?

Yes and no (some introduced)

Sometimes Confused With

Bouteloua repens:
apex of the panicle branch axis entire and the upper glume acute at the apex, unawned or with a short awn-tip (vs. B. rigidiseta, with the apex of panicle branch axis prominently bifid or trifid and upper glume bilobed, the awn emerging from the sinus)
Bouteloua curtipendula:
inflorescence with mostly 30-80 branches and central awn of lowest lemma not flanked by lateral lobes, therefore the lemma with a total of 3 apical lobes (vs. B. rigidiseta, with the inflorescence with mostly 6-12 branches and central awn of lowest lemma of spikelet arising from between two membranous lobes, therefore the lemma with a total of 5 apical lobes).

Family

Poaceae

Genus

Bouteloua

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Information from Dichotomous Key of Flora Novae Angliae

4.  Bouteloua rigidiseta (Steud.) A.S. Hitchc. E

Texas grama. MA. Waste areas, disturbed ground.