Illinois Natural History Survey - University of Illinois

Quercus bicolor
Swamp white oak
Taxonomy

Synonyms:

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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J
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Collection & Observation Timeline [?]

Species Status

Status/Listing: No Information

Notes:

Origin: Native

Species Description

General: Dicot-woody, perennial

Roots: primary

Shoots: alternate leaf arrangment; simple leaf type; crenate leaf margin; Pinnate leaf venation; oblanceolate leaf shape

Inflorescence: catkin

Flowers: unisexual, monoecious; incomplete, not petals

Fruit: nut

Physiology: autotrophic; C3 C02 fixation

Ecology & Natural History

Habitat: Species is distributed along edges of swamps; wet flats; sloughs.

ILPIN Notes: Species maybe causes hayfever; fruit is edible. Seed company numbers: 2, 16, 28, 29. Wood is similar to white oak, but the lateral branches tend to persist and its lumber is usually knotty and of poor quality. Marshbirds and shorebirds eat food (i.e., acorns); terrestrial furbearers (esp. raccoons, tree-squirrels) eat food, such as acorns, bark, wood; also is a good den tree. Regarding waterfowl food value, this pertains especially to wood ducks. Regarding small non-game bird food value, this pertains especially to grackles, bluejays, brown thrashers, red-bellied woodpeckers, red-headed woodpeckers. Regarding small mammals food value, this pertains especially to eastern chipmunks, white-footed mice. Pistillate flowers are in groups of 2-4; leaves sometimes have a few shallow lobes and white, softly hairy on lower surface; bark of branches peels off in large, ragged, papery curls. Forms - seedlings, balled & burlapped, seeds.

Functional Relationships:

  • Pollinators insects (wind)

Human Relationships:

  • Edibility [?] : yes
  • Showy Flowers: low

Wildlife and Livestock Information:

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

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

  • Entire State: 7
  • Chicago Area: 6

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