Native & Naturalized Plants of the Carolinas & Georgia


476

Herbaceous vine
Perennial
Dioecious

Native to the Carolinas & Georgia
Documented growing wild in GA NC SC

Uncommon

Look for it in moist forests and woodlands, per Weakley's Flora

map
To see a detailed map, click here

 

partial shade shade ...Moist ...Variable

LEAVES:
Simple
Alternate (rarely the lowermost with short internodes, appearing nearly whorled)

FLOWER:
Spring/Summer
Greenish-yellow
Unisexual
6 tepals
6 stamens
Inferior ovary

FRUIT:
Summer/Fall
Capsule

 

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



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

WEAKLEY'S FLORA (3/8/10):
Dioscorea villosa   FAMILY Dioscoreaceae

LESS THAN PLANTS NATIONAL DATABASE:
Dioscorea villosa   FAMILY Dioscoreaceae

GREATER THAN & LESS THAN VASCULAR FLORA OF THE CAROLINAS (1968) 043-01-002ab?:
Dioscorea villosa var. villosa   FAMILY Dioscoreaceae

GREATER THAN Vascular Flora of the Carolinas
Dioscorea villosa var. hirticaulis

GREATER THAN Manual of the Southeastern Flora (Small, 1933)
Dioscorea hirticaulis

 

COMMON NAME:
Common Wild Yam, Streamhead Yam


Click or hover over the thumbnails to see larger pictures.

image of Dioscorea villosa

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_divi4_001_lvd

        

image of Dioscorea villosa

Patrick D. McMillan    pdmdvillosa_trsp1

June    Pickens County    SC

Table Rock State Park

Male inflorescence widely branched with 1-4 tiny white flowers per node, per Wildflowers of Tennessee.

image of Dioscorea villosa

Patrick D. McMillan    pdmdvillosa_trsp2

June    Pickens County    SC

Table Rock State Park

All leaves alternate (rarely the lowermost appearing nearly whorled), per Weakley's Flora.

image of Dioscorea villosa

Patrick D. McMillan    pdmdvillosa_trsp3

June    Pickens County    SC

Table Rock State Park

Leaves glabrous to densely pubescent beneath, per Vascular Flora of the Carolinas.

image of Dioscorea villosa

Patrick D. McMillan    pdmdvillosa_trsp4

June    Pickens County    SC

Table Rock State Park

Staminate spikes have up to 4 flowers per node, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.

image of Dioscorea villosa

Patrick D. McMillan    pdmdvillosa_wadc1

June?    Pickens County    SC

Jocassee Gorges

image of Dioscorea villosa

JK Marlow    jkm140704_566

July    Jackson County    NC

Whiteside Mountain

Female (pistillate) spikes have 1 flower per node, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.

image of Dioscorea villosa

JK Marlow    jkm140704_571

July    Jackson County    NC

Whiteside Mountain

image of Dioscorea villosa

Tim Spira    tps_dvillosa2

July        

Leaf with wide sinuses, 7-11 parallel veins, many cross veins; base cordate, per Vascular Flora of the Carolinas.

image of Dioscorea villosa

Patrick D. McMillan    pdmdvillosa_wsm1

August?    Jackson County    NC

Whiteside Mountain

Our native Dioscorea have 7-13 main veins, vs. Smilax section Nemexia w 3(5), per Weakley's Flora.

image of Dioscorea villosa

JK Marlow    s071011_ab

October    Oconee County    SC

Oconee Station/Station Cove

Stem polygonal in cross-section, with 8-14 narrowly winged ribs, per Weakley's Flora.

image of Dioscorea villosa

JK Marlow    s071011_ab2

October    Oconee County    SC

Oconee Station/Station Cove

Fruits about 1" long with 3 broad wings, occuring in clusters, per Wildflowers of Tennessee.