Native & Naturalized Plants of the Carolinas & Georgia


472

Herbaceous vine
Perennial
Dioecious

Non-native: southeast Asia
Documented growing wild in GA - -

Rare

Look for it in disturbed areas, in moist soils, per Weakley's Flora

map
To see a detailed map, click here


Invasive?

This plant may be causing problems in natural areas outside its native range, according to authorities such as:

Alabama Invasive Plant Council, 2012
Georgia Exotic Pest Plant Council, 2006
US Forest Service Southern Research Station

 

...Moist

LEAVES:
Simple
Alternate or opposite

FLOWER:
Spring/Summer
Greenish-white
Unisexual
6 tepals

FRUIT:
Summer/Fall

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Dioscoreales

WEAKLEY'S FLORA (11/30/12):
Dioscorea alata   FAMILY Dioscoreaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Dioscorea alata   FAMILY Dioscoreaceae

 

COMMON NAME:
Water Yam, White Yam, Great Yam, Winged Yam


Click or hover over the thumbnails to see larger pictures.

image of Dioscorea alata

Chris Evans, Illinois Wildlife Action Plan, Bugwood.org    bug_5126013

Month Unknown        

Rough oblong aerial tubers at leaf axils resemble miniature potatoes, per A Field Guide for the Identification of Invasive Plants in Southern Forests.

image of Dioscorea alata

Chris Evans, Illinois Wildlife Action Plan, Bugwood.org    bug_5126028

Month Unknown        

Leaf sides continuously convex (vs. D. polystachya's sides w a concave portion, per Weakley's Flora.

image of Dioscorea alata

Chris Evans, Illinois Wildlife Action Plan, Bugwood.org    bug_5126029

Month Unknown        

Dies back in winter but able to cover small trees in a year, per A Field Guide for the Identification of Invasive Plants in Southern Forests.

image of Dioscorea alata

Forest and Kim Starr, Starr Environmental, Bugwood.org     bug_5160048

Month Unknown        

Stems twining clockwise, climbing up to 20m, broadly winged, 4-angular, per Flora of North America.

image of Dioscorea alata

Forest and Kim Starr, Starr Environmental, Bugwood.org     bug_5163005

Month Unknown        HI

Pistillate inflorescences solitary, 4-8(-20) flowered, 6-35cm, internodes ~1cm, per Flora of North America.

image of Dioscorea alata

Forest and Kim Starr, Starr Environmental, Bugwood.org     bug_5163009

Month Unknown        

Aerial tubers to 4" (10cm) long and 1.2" (3cm) wide, per A Field Guide for the Identification of Invasive Plants in Southern Forests.