Japanese Honeysuckle

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by Casandra14
Last updated 5 years ago


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Japanese Honeysuckle

Ecological Threat In North America, Japanese honeysuckle has few natural enemies which allows it to spread widely and out-complete native plant species. Its evergreen to semi-evergreen nature gives it an added advantage over native species in many areas. Shrubs and young trees can be killed by gridling whrn vines twist tightly around stems and trunks, cutting off the flow of water through the planet. Dense growths of honeysuckle coveering vegetatiion can gradually kill plants by blocking sunlight from reaching their leaves. Vigorous root competition also helps Japanese honeysuckle spread and displace neighboring native vegetation.


Biology and SpreadGrowth and spread of Japanese honeysuckle is throug vegetative(plant growth)and sexual(seed)means. It produces long vegetative rinners that develop roots where stem and leaf junctions(nodes)come in contact with moist soil. Underground stems(rhizomes)help establish and spread the plant locally. Long distance dispersal is by birds and other wildlife that readily consume the fruits and defecate the seeds at various distances from the parent plant.

Japanese honeysuckle is a perennial vine that climbs by twisting its stems around vertical structures, including limbs and trunks of shrubs and small trees. Leaves are oblong to oval, sometimes lobed, have short stalks, and occur in pairs along the stem. In southern and mid-Atlantic states, Japanese honeysuckle often remains evergreen-its leaves remain attached through the winter. In colder northern climates, the leaves may fall off after exposure to prolonged winter tempertures. Flowers are tubular, with five fused petals, white to pink, turning yellow with age, very fragrant, and occur in pairs along the stem at leaf junctures. Stems and leaves are sometimes covered with fine, soft hairs. Japanese honeysuckle blooms from late April through July and sometimes into October. Small black fruits are produced in autumn, each containing 2-3 oval to oblong, dark brown seeds about 1/4 inch across.




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