Illinois Natural History Survey - University of Illinois

Carya illinoinensis
Pecan
Taxonomy

Synonyms: Carya illinoensis, Carya illinoiensis

Subspecific taxa:

Classification:

  • Magnoliophyta

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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F
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M
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A
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M
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J
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A
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O
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N
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Collection & Observation Timeline [?]

Species Status

Status/Listing: No Information

Notes:Note carefully the spelling of this species

Origin: Native

Species Description

General: Dicot-woody, perennial

Roots: primary

Shoots: alternate leaf arrangment; compound, pinnately leaf type; doubly serrate leaf margin; Pinnate leaf venation; linear, oblong leaf shape

Inflorescence: spike, catkin

Flowers: unisexual, monoecious; incomplete, not petals; perigynous ovary position

Fruit: nut

Physiology: autotrophic; C3 C02 fixation

Ecology & Natural History

Habitat:

ILPIN Notes: Female flowers are perigynous and in spikes; large elipsoid fruit; more leaflets than other hickories. Seed company numbers: 2, 13, 14, 19, 20, 22, 25, 27, 28. Terrestrial furbearers (esp. squirrels) eat bark and nuts as food. Regarding waterfowl food value, this pertains especially to wood ducks. Regarding small mammals food value, this applies especially to eastern chipmunks. Form - whips, balled & burlapped, seedlings, seeds. Nut kernal is edible; causes hayfever.

Functional Relationships:

  • Pollinators insects (wind)

Human Relationships:

  • Edibility [?] : yes
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value: deer: good; upland game birds: good; waterfowl: good; small non-game bird: good; small mammals: good
  • Cover Value: small non-game bird: good

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

  • Entire State: 6
  • Chicago Area:

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