Native & Naturalized Plants of the Carolinas & Georgia


3495

Herbaceous vine
Annual
Dioecious

Non-native: Japan, Taiwan, & China
Documented growing wild in GA NC SC

Common (rare in Carolinas & Georgia)

Look for it disturbed areas, particularly in rich, alluvial soils, where it has become a serious weed along major VA rivers, per Weakley's Flora

map
To see a detailed map, click here


INVASIVE

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

Kentucky Exotic Pest Plant Council, 2013
Mid-Atlantic Exotic Pest Plant Council
SC Exotic Pest Plant Council, 2014
Virginia Department of Conservation and Recreation, 2014

 

...Wet ...Moist

LEAVES:
Simple - palmately lobed
Opposite

FLOWER:
Summer/Fall
Greenish
Unisexual
Radially symmetrical
5 sepals
Petals absent
Superior ovary

FRUIT:
Summer/Fall
Nutlet

 

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



Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Rosales

WEAKLEY'S FLORA (11/30/12):
Humulus japonicus   FAMILY Cannabaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Humulus japonicus   FAMILY Cannabaceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (1968) 058-01-002:
Humulus japonicus   FAMILY Cannabaceae

 

COMMON NAME:
Japanese Hops


Click or hover over the thumbnails to see larger pictures.

image of Humulus japonicus

JK Marlow    jkm170320_139

March    Laurens County    SC

Charlie Lollis Memorial Park

image of Humulus japonicus

JK Marlow    jkm170322_184

March    Greenville County    SC

Lake Conestee Nature Park

image of Humulus japonicus

JK Marlow    jkm170322_188

March    Greenville County    SC

Lake Conestee Nature Park

image of Humulus japonicus

JK Marlow    jkm100513_025

May    Greenville County    SC

Lake Conestee Nature Park

Most leaves 5-9 lobed, per Weakley's Flora.

image of Humulus japonicus

JK Marlow    jkm100513_027

May    Greenville County    SC

Lake Conestee Nature Park

Leaves are rough to the touch & occur on long petioles up to 8" in length, per Invasive Exotic Plants of North Carolina.


click here to see other plants that look similar to this COMPARE palmately veined leaves of vines

image of Humulus japonicus

JK Marlow    jkm100513_028

May    Greenville County    SC

Lake Conestee Nature Park

image of Humulus japonicus

JK Marlow    jkm100513_031

May    Greenville County    SC

Lake Conestee Nature Park

Stems are covered with downward pointing prickles, per Invasive Exotic Plants of North Carolina.

image of Humulus japonicus

JK Marlow    jkm140625_385

June    Greenville County    SC

Cleveland Park

image of Humulus japonicus

JK Marlow    jkm140625_397

June    Greenville County    SC

Cleveland Park

image of Humulus japonicus

JK Marlow    jkm110717_161

July    Greenville County    SC

Lake Conestee Nature Park

This plant has become a serious weed along major rivers in Virginia, per Invasive Exotic Plants of North Carolina.

image of Humulus japonicus

JK Marlow    jkm140809_403

August    Greenville County    SC

Swamp Rabbit Trail

Male flowers bloom along upright flower stems 6-10" long, per Invasive Plants, Guide to Identification, Impacts and Control.

image of Humulus japonicus

JK Marlow    jkm140809_411

August    Greenville County    SC

Swamp Rabbit Trail

image of Humulus japonicus

JK Marlow    jkm140823_096

August    Greenville County    SC

Swamp Rabbit Trail

Staminate inflorescences axillary and terminal, erect, cymose panicles, per Flora of North America.

image of Humulus japonicus

JK Marlow    jkm140823_096b

August    Greenville County    SC

Swamp Rabbit Trail

Five sepals, petals absent, per Vascular Flora of the Carolinas.

image of Humulus japonicus

JK Marlow    jkm161028_040

October    Greenville County    SC

Lake Conestee Nature Park

image of Humulus japonicus

JK Marlow    jkm161028_982

October    Greenville County    SC

Lake Conestee Nature Park