hairy grama

(Bouteloua hirsuta var. hirsuta)

Conservation Status
hairy grama
  IUCN Red List

not listed

     
  NatureServe

N5 - Secure

SNR - Unranked

     
  Minnesota

not listed

     
           
           
 
Description
 
 

Hairy grama grows in tufts but does not form large stands. The culms reach 10 to 20 at maturity.

The leaves are mostly basal. The lower margin of the blade has soft hairs arising from tiny bumps.

The inflorescence is 1 to 4 flowering, comb-like spikes. The needle-like main axis (rachis) of the flowering spike extends conspicuously beyond the spikelet-bearing portion forming a stiff bristle. The spike is parallel to the ground when flowering, but gradually curves backward becoming upright as the seeds mature.

The upper glume is densely hairy along the midvein.

 
     
 

Height

 
 

8 to 16

 
     
 

Similar Species

 
 

Blue grama (Bouteloua gracilis) spike rachis does not extend beyond the uppermost spikelet. The upper glume is sparsely, not densely, hairy along the midvein.

Buffalo grass (Buchloë dactyloides) has much shorter spikes with 6 to 12 spikelets arranged in two rows.

 
     
 
Habitat
 
 

Dry, open prairies. Sandy soils.

 
     
 
Biology
 
 

Flowering

 
 

June to August

 
     
 
Use
 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

2, 3, 4, 5, 7, 28.

 
  11/2/2018      
         
 

Nativity

 
 

Native

 
         
 

Occurrence

 
 

 

 
         
 
Taxonomy
 
  Kingdom Plantae (green algae and land plants)  
  Subkingdom Viridiplantae (green plants)  
  Infrakingdom Streptophyta (land plants and green algae)  
  Superdivision Embryophyta (land plants)  
  Division Tracheophyta (vascular plants)  
  Subdivision Spermatophytina (seed plants)  
  Class Liliopsida (monocots)  
 

Order

Poales (grasses, sedges, cattails, and allies)  
 

Family

Poaceae (grasses)  
  No Rank PACMAD clade  
  Subfamily Chloridoideae  
  Tribe Cynodonteae  
  Subtribe Boutelouinae  
 

Genus

Bouteloua (grama)  
  Species Bouteloua hirsuta (hairy grama)  
       
 

Synonyms

 
 

Atheropogon hirtus

Atheropogon papillosus

Bouteloua aschenborniana

Bouteloua foenea

Bouteloua hirta

Bouteloua pappilosa

Chondrosium hirtum

Chondrosum hirsutum var. hirsutum

Chondrosum papillosum

 
       
 

Common Names

 
 

black grama

buffalo grass

hairy grama

 
       

 

 

 

 

 

Glossary

Culm

The hollow or pithy stem of a grass, sedge, or rush.

 

Glume

A chaffy, empty, sterile bract at the base of a grass spikelet. Glumes usually occur in pairs, but occasionally only one is present.

 

Rachis

The central stem of an inflorescence.

       
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