Illinois Natural History Survey - University of Illinois

Helenium flexuosum
Sneezeweed, Purple-headed sneezeweed
Taxonomy

Synonyms: Helenium nudiflorum

Subspecific taxa:

Classification:

Other taxonomic & nomenclature sources: USDA PlantsITISThe Plant ListIPNI

Images

   
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Species Distribution
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County Map Legend
Absent:
Not known from county
Medium confidence:
Medium or unknown confidence;
often old records or unverifiable observations
Medium-high confidence:
Often observations by expert botanists
High confidence:
Often vouchered herbarium records
Planted / introduced:
Native species introduced outside historic range,
or only in planted locations within county (e.g., restorations)
Historic / extirpated:
Only historic records for the species; likely extirpated
(Note that this category is not yet functional)

North American distribution maps for this species: FLNAUSDA PlantsBONAPBISON

Collection & Observation Phenology [?]

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M
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J
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A
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Collection & Observation Timeline [?]

Species Status

Status/Listing: No Information

Notes:

Origin: Native

Species Description

General: Dicot-herb, perennial

Roots: adventitious, fibrous

Shoots: alternate leaf arrangment; simple leaf type; entire leaf margin; Pinnate leaf venation; awl-shaped, linear, oblong, lanceolate, ovate leaf shape

Inflorescence: corymb, head

Flowers: perfect; complete, regular, irregular; yellow, violet, others; epigynous ovary position

Fruit: achene

Physiology: autotrophic

Ecology & Natural History

Habitat: Species is distributed in margins of lowland and upland sinkhole ponds, sloughs, ditches, swampy meadows, wet depressions in upland prairies, moist places on rocky glades bordering bluff escarpments. In northern Illinois it is distributed in acid meadows.

ILPIN Notes: Disk florets are perfect and fertile, purple-brown. Ray florets are sterile and yellow, occasionally with purple bases. Species was introduced in northern Illinois and is rare there. It is common in southern Illinois. Species has leaves which are widely spaced; strongly decurrent.

Functional Relationships:

Human Relationships:

  • Edibility [?] :
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

Coefficient of Conservatism (C-value) [?] :

  • Entire State: 4
  • Chicago Area:

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