Illinois Natural History Survey - University of Illinois

Helianthus divaricatus
Woodland sunflower
Taxonomy

Synonyms:

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 [?]

J
0
F
0
M
0
A
0
M
0
J
0
J
0
A
0
S
0
O
0
N
0
D
0

Collection & Observation Timeline [?]

Species Status

Status/Listing: No Information

Notes:

Origin: Native

Species Description

General: Dicot-herb, perennial

Roots: adventitious, fibrous, rhizomes

Shoots: opposite leaf arrangment; simple leaf type; serrate leaf margin; Pinnate leaf venation; oblong, lanceolate leaf shape

Inflorescence: head

Flowers: perfect; complete, regular, irregular; epigynous ovary position

Fruit: achene

Physiology: autotrophic

Ecology & Natural History

Habitat: Open woods; rocky woods; in Northern Illinois, very common in sandy black oak woods, also in mixed woodland (Quercus alba) where there has been fire or other disturbances.

ILPIN Notes: Rogers, C. E., T. E. Thompson, and G. J. Seiler. 1982. Sunflower species of the United States. National Sunflower Association, Bismarck, North Dakota. 75pp. Possible use as; breadstuff, oil, soup, coffee substitute. Disk florets perfect and fertile; ray florets sterile. Stems with a whitish bloom, with or without small, stiff hairs; leaves thick, opposite narrowly lanceolate to triangular ovate; short or no petioles.

Functional Relationships:

Human Relationships:

  • Edibility [?] : yes-qualified
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

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

  • Entire State: 5
  • Chicago Area: 5

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