Illinois Natural History Survey - University of Illinois

Dioscorea polystachya
Cinnamon vine
Taxonomy

Synonyms: Dioscorea oppositifolia, Dioscorea batatas

Subspecific taxa:

Classification:

Other taxonomic & nomenclature sources: USDA PlantsITISThe Plant ListIPNI

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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
0
J
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J
0
A
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S
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O
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N
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D
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Collection & Observation Timeline [?]

Species Status

Status/Listing: No Information

Notes:

Origin: Asia

Species Description

General: Monocot, perennial

Roots: adventitious, rhizomes, tubers

Shoots: alternate, opposite, whorled leaf arrangment; simple leaf type; entire, other leaf margin; Other leaf venation; orbicular and peltate leaf shape

Inflorescence: spike

Flowers: unisexual, dioecious; 3 merous; complete, regular; yellow, green; epigynous ovary position

Fruit: berry

Physiology: autotrophic; C3 C02 fixation

Ecology & Natural History

Habitat: Species distributed among wastes.

ILPIN Notes: See geographic comments. Species is commonly planted for ornament. It has deep subterranean potato-like tubers 2-3 feet long, cooked like potatoes; reputed to be excellent. Do not eat new shoots - they may be purgative. Capsules probably are never produced within U.S. Species is a native of S. China; found in Jackson county. Species bears tubers in leaf axils.

Functional Relationships:

Human Relationships:

  • Edibility [?] :
  • Showy Flowers:

Wildlife and Livestock Information:

  • Food Value:
  • Cover Value:

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

  • Entire State:
  • Chicago Area:

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