Invasive and Exotic Species of North America Home   |   About   |   Cooperators   |   Statistics   |   Help   |
Invasive and Exotic Species of North America
Join Now   |    Login    |    Search    |    Browse    |    Partners    |    Library    |    Contribute

Japanese Honeysuckle

Lonicera japonica

Plant: Semi-evergreen woody vine with opposite leaves, high climbing and trailing, to 80 ft (30 m) long, often forming arbors throughout forest canopies and/or ground cover under canopies, from long woody rhizomes that sprout frequently.

Stem: Slender becoming stout, round in cross-section, brown and hairy becoming tan barked, having fissures and sloughing with age, opposite branched, rooting at low nodes.

Leaves: Opposite, mostly semi-evergreen or evergreen, ovate to elliptic to oblong, 1.6-2.6 in (4-6.5 cm) long and 0.8-1.5 in (2-3.8 cm) wide, base rounded, tips blunt-pointed to rounded, margins entire with fine hairs but often lobed in the spring, smooth to rough hairy both surfaces.

Flowers: Apr-Jun. Axillary pairs on a bracted stalk, fragrant, white (or pink) and pale yellow, 0.8-1.2 in (2-3 cm) long, thin tubular flaring to 5 lobes in 2 lips (upper lip 4-lobed and lower lip 1-lobed), longest lobes about equaling tube, 5 stamens and 1 pistil projecting outward becoming curved

Fruit and seeds: Aug-Mar. Berry black, glossy, nearly spherical, 0.1 in (5-6 mm) wide, stalks 0.4-1.2 in (1-3 cm) long with persistent sepals, seeds several.

May (T. Bodner)

October (T. Bodner)

Ecology: Common invasive exotic, shade tolerant, overwhelming and replacing native flora on a wide range of sites. One of the most common vines in pine plantations and bottomland forests in mid-region. Occurs as dense infestations along forest margins and rights-of-way. Occurs under dense canopies and as arbors high in canopies. Persists by rootstocks and spreads by rooting at nodes and animal-dispersed seeds.

Resembles yellow jasmine (Gelsemium sempervirens) which has thinner leaves and hairless stems.

Exotic Pest Plant Control Recommendations

Bayer International Code - LOJA
FIA Code - 3101

May (J. Miller) September (J. Miller)


States with suspected
infestations are shown in red.*

* USDA, NRCS. 2001. The PLANTS Database, Version 3.1 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. February 5, 2002.
May (T. Bodner)
line
USDA Forest ServiceUSDA APHIS PPQ The Bugwood Network University of Georgia Invasive.org is a joint project of
The Bugwood Network, USDA Forest Service & USDA APHIS PPQ.
The University of Georgia - Warnell School of Forest Resources and
College of Agricultural and Environmental Sciences - Dept. of Entomology
Last updated on Sunday, August 10, 2003 at 11:15 PM
Questions and/or comments to the