cylindric blazing star

(Liatris cylindracea)

Conservation Status
cylindric blazing star
  IUCN Red List

not listed

     
  NatureServe

NNR - Unranked

SNR - Unranked

     
  Minnesota

not listed

     
           
           
           
           
           
           
 
Description
 
 

Cylindric blazing star is a 8 to 24 tall, erect, perennial forb that rises on one or more stems from a globe-shaped corm.

The stems are erect, leafy, hairless, light green, and unbranched or sometimes branched near the top.

Basal leaves are stalked and form a rosette. Stem leaves are alternate. Basal and lower stem leaves are linear, firm, stalked, 3 to 10 long and 1 16 to ½, but usually no more than ¼ wide. The lowermost stem leaves are small and somewhat sheath the stem. The largest leaves are immediately above those. The upper surface is deep green and hairless. There is a prominent midvein and 2, sometimes 4, narrower, parallel veins. The lower surface is green and usually hairless. The margins are usually light, thickened, untoothed, often turned under, and have a few long, soft, straight hairs below the middle. Middle and upper stem leaves are similar, stalkless, usually linear, sometimes narrowly inversely lance-shaped, and ¾ to 4 long, becoming gradually smaller as they ascend the stem.

The inflorescence is a single flower head or an unbranched, elongated, 2 to 4 long, spike-like cluster of 2 to 28 flower heads at the end of the stem. The heads are loosely spaced and the axis of the inflorescence is easily visible between the heads. They are sometimes stalkless or more usually are held upwards on stiff, ascending stalks that are 1 16 to ¾ long, though usually no more than long. The stalks usually have 1 or more leaf-like bracts at the base.

The flower heads are to 1 wide. The terminal head is usually longer than the others. The whorl of bracts at the base of the flower head (involucre) is smooth, narrowly cup-shaped to nearly cylinder-shaped, and 7 16to ¾ long. The bracts making up the involucre are in 5 to 7 overlapping series. They are broadly egg-shaped–triangular to inversely lance-shaped and taper abruptly to a short, sharp point. They have a narrow, thin, pale or often purple margin. The tips are appressed or strongly ascending, not bent backward. The lowermost bracts are narrower and noticeably longer than the rest.

There are 10 to 35 disk florets and no ray florets. Each disk floret has 5 petals fused for most of their length into a tube then separated at the tip into 5 lobes. The corolla tube is ½ to 9 16 long, white at the base grading to pink at the tip. There are 5 stamens concealed within the corolla tube and a long, white, forked style that protrudes well beyond the tip of the corolla tube. There is no fragrance.

The fruit is an achene with hair-like bristles attached. The bristles are feather-like (plumose), though this may be difficult to see without a hand lens.

 
     
 

Height

 
 

8 to 24

 
     
 

Flower Color

 
 

Pink

 
     
 

Similar Species

 
 

Rough blazing star (Liatris aspera var. aspera) is a taller plant, 16 to 48 in height at maturity. The leaves have 1 main vein, not 3 or 5. There are usually 10 or more flower heads. The involucre is broadly cup-shaped or bell-shaped. The bracts of the involucre appear swollen and have margins that appear torn and uneven. The hairs on the achene are barbed, not plumose.

 
     
 
Habitat
 
 

Dry. Prairies, open places.

 
     
 
Biology
 
 

Flowering

 
 

July to September

 
     
 
Use
 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

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

 
  10/14/2015      
         
 

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 Magnoliopsida (flowering plants)  
  Superorder Asteranae  
 

Order

Asterales (sunflowers, bellflowers, fanflowers, and allies)  
 

Family

Asteraceae (sunflowers, daisies, asters, and allies)  
  Subfamily Asteroideae  
  Supertribe Helianthodae  
  Tribe Eupatorieae (bonesets, blazingstars, and allies)  
  Subtribe Liatrinae  
 

Genus

Liatris (blazing star, gayfeather)  
       
 

Subordinate Taxa

 
 

 

 
       
 

Synonyms

 
  Lacinaria cylindracea  
       
 

Common Names

 
 

cylindric blazing star

cylindrical blazing star

few-headed blazing star

Ontario blazing star

 
       

 

 

 

 

 

 

 

Glossary

Achene

A dry, one-chambered, single-seeded fruit, formed from a single carpel, with the seed attached to the membranous outer layer (wall) only by the seed stalk; the wall, formed entirely from the wall of the superior ovary, does not split open at maturity, but relies on decay or predation to release the contents.

 

Bract

Modified leaf at the base of a flower stalk, flower cluster, or inflorescence.

 

Corm

A short, solid, vertical, thickened, underground stem that serves as a storage organ.

 

Corolla

A collective name for all of the petals of a flower.

 

Involucre

A whorl of bracts beneath or surrounding a flower or flower cluster.

 

Linear

Long, straight, and narrow, with more or less parallel sides, like a blade of grass.

 

Plumose

Feathery; having fine, pinnately arranged, lateral bristles or hairs arranged on both sides of an axis.

       
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Plant

  cylindric blazing star   cylindric blazing star
       
  cylindric blazing star   cylindric blazing star
       

Inflorescence

  cylindric blazing star   cylindric blazing star
       
  cylindric blazing star   cylindric blazing star
       

Leaves

  cylindric blazing star    
       
       

 

Camera

     
Slideshows
   
  L. cylindracea
Joshua Mayer
 
  L. cylindracea  
 
About

Cylindrical Blazing Star

 
     

 

slideshow

       
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