Dioscorea polystachya

Characteristics
Monocots
Dioscoreaceae
Dioscorea
Dioscorea polystachya Turcz.
Chinese Yam
vine - forb
0
**
Not Native TN[SNA] KY[SNA] (State Rank) GNR (Global Rank)
Anther Type
Basifixed
Armaments
No
Base Flower Color
Green; White
Duration
Perennial
Fruit Dehiscence
Yes
Fruit Type
Capsule
Fruit Wet/Dry
Dry
General Ecology
Terrestrial
Growth Habit
vine - forb
Leaf Arrangement
whorled
Leaf Complexity
simple
Leaf Dissection
0
Leaf Duration
deciduous
Leaf Fragrance
No
Leaf Petiole Type
petiolate
Leaf Type
broadleaf
Leaf Venation
palmate
Leaflet Margins
entire; lobed
Leaflet Number
0
Moisture Requirements
Mesic; Hydric
Natural Area Presence
PCSF; FCFSP; NCCGSNA; LULA; LRC; LGS; NRG; DRU; GILES; GRSM; SGSNA; TRG; SM; LC; FG
Overall Flower Symmetry
Actinomorphic
Parent Rock
Calcareous; Chert; Granite; Limestone
Petal Number
6
Pistil Number
3
Soil Composition
Mineral
Soil pH
Acidic; Alkaline; Circumneutral
Stamen Number
6
Unconsolidated Rock
Yes
Unconsolidated Size Class
Cobble; Gravel
Woody Herbaceous
Herbaceous
View details of Herbarium specimens
** Not applicable or data not available.
Classification
Liliales
Dioscorea
Dioscorea polystachya Turcz. - Chinese Yam
Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display its name.

Click the question mark icon () to view additional information about the ecoregions shown. In the map legend, there are links to toggle the visibility of the ecoregions and/or their labels. In addition, clicking on an ecoregion name will highlight that region on the map.

Ecoregions
  • Southeastern Plains
    • Blackland Prarie
  • Blue Ridge Mountains
  • Ridge and Valley
  • Cumberland Plateau
  • Cumberland Mountains
  • Allegheny Plateau
  • Interior Plateau
    • Bluegrass Region
    • Nashville Basin
    • Pennyroyal Karst Plain
    • Western Highland Rim
    • Eastern Highland Rim
  • Interior River Valleys and Hills
    • Shawnee / Caseyville Hills
  • Mississippi Alluvial Plain
  • Mississippi Valley Loess Plains
Synonyms
Specimens and Distribution

Click on an Accession Number to view additional details about the specimen.

Range of years during which specimens were collected:

Plant Photos
Dioscorea polystachya - 13
Dioscorea polystachya - Dwayne Estes View Full Size
Dioscorea polystachya - 2
Dioscorea polystachya - Joey Shaw View Full Size
Dioscorea polystachya - 2
Dioscorea polystachya - Joey Shaw View Full Size
Dioscorea polystachya - 20
Dioscorea polystachya - Milo Pyne View Full Size
Dioscorea polystachya - 19
Dioscorea polystachya - Theo Witsell View Full Size
Dioscorea polystachya - 19
Dioscorea polystachya - Theo Witsell View Full Size
Dioscorea polystachya - 2
Dioscorea polystachya - Joey Shaw View Full Size
Dioscorea polystachya - 2
Dioscorea polystachya - Joey Shaw View Full Size