Weed Seed - Chinese Yam (Dioscorea polystachya)

Invasive Plant - Chinese Yam (Dioscorea polystachya)

Family

Dioscoreaceae

Synonyms

Dioscorea batatas

Distribution in Canada

Not known to occur in Canada.

Duration of life cycle

Perennial

Seed/Fruit type

True seed, although plants can produce vegetative "bulbils"

Seed identification features

Size

  • length: 8.0–15.0 mm
  • width: 7.0–10.0 mm
  • thickness: 0.1 mm

Shape

  • in outline: intact seed with wing is oblong (straight sides with rounded ends)

Surface texture

  • smooth, fibrous

Colour

  • light yellow around edges, becoming yellow towards centre
  • central seed area is grey

Other structures

  • seeds typically have a large papery wing that is torn or removed during processing

Similar species

No similar species

Photos

Photo - Chinese yam (Dioscorea polystachya) seeds
Chinese yam (Dioscorea polystachya) seeds (Photography from United States Department of Agriculture–National Resources Conservation Service [USDA–NRCS], PLANTS Database) http://plants.usda.gov
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