balsam groundsel

(Packera paupercula)

Conservation Status
balsam groundsel
  IUCN Red List

not listed


NNR - Unranked

SNR - Unranked


not listed

Wetland Indicator Status
  Great Plains

FAC - Facultative


FAC - Facultative

  Northcentral & Northeast

FAC - Facultative


Balsam groundsel is a highly variable, 4 to 24 tall, erect, perennial forb. It is abundant and widespread. It rises on usually 1 stem, occasionally 2 to 4 loosely clustered stems, from a slender or stout, erect to horizontal rootstock. Older plants form a small underground caudex. It often forms dense colonies. It sometimes reproduces vegetatively by short or creeping rhizomes, but rarely produces above-ground, creeping stems (stolons).

The stems are erect, light green, hollow, and cylinder-shaped with shallow ridges. When young they are lightly covered with tufts of short, matted, woolly hairs. They soon become almost hairless except at the base and in the leaf axils.

Basal leaves are narrowly egg-shaped to elliptic or inversely lance-shaped. They are on long leaf stalks. They are 1 to 2 long, to ¾ wide. They are tapered, sometimes widely, at the base, and rounded or bluntly pointed at the tip. They are usually unlobed, but sometimes have a few narrow, irregular lobes near the base. The lower surface is hairless or sparsely to moderately hairy with inconspicuous hairs. The margins may be sharply toothed or have rounded teeth. Basal leaves are persistent, usually present when the plant is in flower.

Stem leaves are alternate. Lower stem leaves are stalked, deeply lobed (pinnatifid), and sometimes much larger than the basal leaves. As they ascend the stem the leaves become gradually smaller, deeply pinnately lobed, and stalkless or nearly stalkless. The upper and lower surfaces are hairless except sometimes for patches of dense, cobwebby hairs near the base. The margins are sharply toothed.

The inflorescence is a dense or loose, branched cluster of less than 20, usually 2 to 10, flower heads at the end of the stem. The outer heads are on longer flower stalks than the inner heads, resulting in a flat topped cluster. The flower stalks are hairless and usually have a small, leaf-like bract at the base.

The flower heads are ½ to 1¼ wide. There are 13 or 21 green bracts united for most of their length into a cylinder-shaped flower cup (calyx), and separated at the tip into pointed, thin, purple-tipped lobes. The calyx is usually hairless, sometimes with cobwebby hairs near the base. There are 8 or 13 yellow ray florets and 50 to 65 or more yellow disk florets.

The fruit is an achene.




4 to 24


Flower Color


Yellow ray florets, yellow or golden yellow disk florets


Similar Species


Prairie groundsel (Packera plattensis) sometimes produces well-developed stolons. The inflorescences may have more than 20 flower heads. The flower heads have 8 to 10 ray florets.


Wet to moderate moisture. Prairies, meadows, stream banks.




May to August




Distribution Map



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









  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  


Asterales (sunflowers, bellflowers, fanflowers, and allies)  


Asteraceae (sunflowers, daisies, asters, and allies)  
  Subfamily Asteroideae  
  Supertribe Senecionodae  
  Tribe Senecioneae (groundsels and allies)  
  Subtribe Senecioninae  
  Genus Packera (ragwort)  

The 64 species in the genus Packera were formerly included in the genus Senecio.


Subordinate Taxa


Some sources, including Kew Plants of the World Online and ITIS, recognize three or five varieties of Packera paupercula. Other sources, including NCBI, GRIN, and Flora of North America (FNA), do not recognize any varieties. FNA contends that the differences are due to hybridization and introgression, and do not justify recognition as varieties.




Senecio balsamitae

Senecio crawfordii

Senecio gaspensis

Senecio gaspensis var. firmifolius

Senecio pauperculus

Senecio pauperculus var. balsamitae

Senecio pauperculus var. crawfordii

Senecio pauperculus var. firmifolius

Senecio pauperculus var. neoscoticus

Senecio pauperculus var. praelongus

Senecio pauperculus var. thompsoniensis

Senecio tweedyi


Common Names


balsam groundsel

balsam ragwort

Canadian butterweed

northern meadow groundsel

northern ragwort












The upper angle where the leaf stalk meets the stem.



A small, often secondary bract within an inflorescence; a bract that is borne on a petiole instead of subtending it.



The group of outer floral leaves (sepals) below the petals, occasionally forming a tube.



A short, thickened, woody, persistent enlargement of the stem, at or below ground level, used for water storage.



The small swelling of the stem from which one or more leaves, branches, or buds originate.



Deeply cut, more than half way to the midrib but not to the midrib, into lobes that are spaced out along the midrib; the lobes do not form separate leaflets.



A horizontal, usually underground stem. It serves as a reproductive structure, producing roots below and shoots above at the nodes.



An above-ground, creeping stem that grows along the ground and produces roots and sometimes new plants at its nodes. A runner.

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  balsam groundsel   balsam groundsel


  balsam groundsel   balsam groundsel
  balsam groundsel   balsam groundsel

Flower Head

  balsam groundsel    

Middle Stem Leaf

  balsam groundsel   balsam groundsel

Lower Stem Leaves

  balsam groundsel    


  balsam groundsel    



  Senecio pauperculus BALSAM RAGWORT
Frank Mayfield
  Senecio pauperculus BALSAM RAGWORT  



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