Lonicera japonica | |
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Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Dipsacales |
Family: | Caprifoliaceae |
Genus: | Lonicera |
Species: | L. japonica |
Binomial name | |
Lonicera japonica | |
Synonyms [1] | |
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Lonicera japonica, known as Japanese honeysuckle [2] and golden-and-silver honeysuckle, [3] is a species of honeysuckle native to East Asia, including many parts of China. It is often grown as an ornamental plant, but has become an invasive species in a number of countries. It is used in traditional Chinese medicine.
Lonicera japonica is a twining vine [4] able to climb up to 10 m (33 ft) high or more in trees, with opposite, simple oval leaves 3–8 cm (1+1⁄4–3+1⁄4 in) long and 2–3 cm (3⁄4–1+1⁄4 in) broad. When its stems are young, they are slightly red in color and may be fuzzy. Older stems are brown with peeling bark, and are often hollow on the inside. [5]
The flowers are double-tongued, opening white and fading to yellow, and sweetly vanilla scented. The fruit, which is produced in fall, [5] is a black spherical berry 3–4 mm (1⁄8–3⁄16 in) diameter containing a few seeds. [6]
Lonicera japonica contains methyl caffeate, 3,4-di-O-caffeoylquinic acid, methyl 3,4-di-O-caffeoylquinate, protocatechuic acid, methyl chlorogenic acid, and luteolin. The two biflavonoids, 3′-O-methyl loniflavone and loniflavone, along with luteolin and chrysin, can be isolated from the leaves. [7] Other phenolic compounds present in the plant are hyperoside, chlorogenic acid, and caffeic acid. [8] The two secoiridoid glycosides, loniceracetalides A and B, can be isolated, together with 10 known iridoid glycosides, from the flower buds. [9] The plant also contains the saponins loniceroside A and B [10] and the anti-inflammatory loniceroside C. [11]
There are three subspecies of Lonicera japonica:
Image | Subspecies | Description | Distribution |
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![]() | Lonicera japonica var. chinensis(P.Watson) Baker | Corolla purple outside, white inside. Usually diploid 2n=18 | China (Anhui, 安徽省 in Chinese) around 800 meters [12] |
| Lonicera japonica var. japonica | Vigorous vine, Corolla white, later yellow-white. Usually diploid 2n=18 | Grows on the edge of forest in China, Japan, and Korea [13] |
Lonicera japonica var. miyagusukianaMakino | Tetraploid with chromosome number of 2n=36 | Found in tops of exposed windy limestone cliffs in Ryukyus Islands, Japan [14] | |
The flowers can also be a significant source of food for deer, rabbits, hummingbirds, and other wildlife. [15]
Japanese honeysuckle has become naturalized in Argentina, Australia, Brazil, Mexico, New Zealand, and much of the United States, including Hawaii, as well as a number of Pacific and Caribbean islands. It is classified as a noxious weed in 46 states, Prohibited to be bought and sold in Connecticut, Illinois, Massachusetts, and Vermont, and banned in Indiana and New Hampshire. [16] [17] [18] It is listed on the New Zealand National Pest Plant Accord as an unwanted organism. [19]
Lonicera japonica was initially brought to the U.S. from Japan in the early 1800s as an ornamental plant. It is still deliberately planted in the U.S. for reasons such as erosion control or forage for deer, but has become invasive in many areas. [5] It prefers to invade areas that have been disturbed, such as roadsides or floodplains. It will generally only invade forests when the canopy has been opened by logging or fallen trees, as it grows less vigorously in the shade. [20] Once it has invaded an area, Lonicera japonica grows rapidly and outcompetes native plants for sunlight and nutrients. [5] It proliferates using both sexual and vegetative reproduction, producing seeds that are spread by animals and expanding locally via rhizomes. [21] Eventually, it will form a dense thicket which prevents other plant species from germinating in that area. [5] Due to its suppression of germination in the understory, Lonicera japonica also prevents the regeneration of trees. [22]
Management of invasive Lonicera japonica has been achieved through a variety of means. Small patches can be removed by hand, or using simple digging tools, [21] but all plant parts including roots and rhizomes must be removed to prevent resprouting. [5] Larger patches can be removed through repeated mowing, but application of herbicide is also recommended to prevent regrowth. [21] There has been some study of using controlled burns to remove L. japonica, but the underground portion of the plant is usually able to survive and resprout, limiting the effectiveness of this method. [5] Browsing by herbivores may limit its growth, but is unlikely to fully eliminate it. [22]
The EPA of New Zealand approved the release of Limenitis glorifica butterflies in 2013 as a biological control for Lonicera japonica. This butterfly is host specific for Japanese honeysuckle, but it may incidentally feed on other closely related plants, including Himalayan honeysuckle Leycesteria formosa . [23] Oberea shirahatai is a Japanese honeysuckle host-specific beetle that feeds on the stems and leaves of Japanese honeysuckle. It was released in New Zealand in 2018 as another L. japonica-specialist biological control. [24]
Even though it is a highly invasive and destructive plant, [25] this species is often sold by American nurseries as the cultivar 'Hall's Prolific' (Lonicera japonica var. halliana),[ citation needed ] and in the UK as the cultivar 'Halliana'. The cultivar is also known as Hall's Japanese honeysuckle. [26] It is an effective groundcover and has strong-smelling flowers. It can be cultivated by seed, cuttings, or layering. In addition, it will spread itself via shoots if given enough space to grow. The variety L. japonica var. repens [27] has gained the Royal Horticultural Society's Award of Garden Merit. [28]
All parts of the plant other than the flower nectar have the potential to be toxic. [29]
Japanese honeysuckle flowers are edible to humans and appreciated for their sweet-tasting nectar.[ citation needed ]
In traditional Chinese medicine, [30] Lonicera japonica is called rěn dōng téng ( 忍冬 藤 ); [30] literally "winter enduring vine") or jīn yín huā [30] (Chinese : 金 銀 花 ; literally "gold-silver flower", in reference to the presence of flowers of different age on the same plant as each flower change from white (silver) to yellow (gold)).[ citation needed ] Alternative Chinese names include er hua (二花) and shuang hua (雙花), meaning double-[color] flowers. [31] [32]
Honeysuckles are arching shrubs or twining vines in the genus Lonicera of the family Caprifoliaceae. The genus includes 158 species native to northern latitudes in North America, Eurasia, and North Africa. Widely known species include Lonicera periclymenum, Lonicera japonica and Lonicera sempervirens. L. japonica is a highly invasive species considered a significant pest in parts of North America, Europe, South America, New Zealand, Australia, and Africa.
Lonicera morrowii, the Morrow's honeysuckle, is a deciduous honeysuckle in the family Caprifoliaceae, native to Japan, Korea, and Northeast China. It is colloquially called "bush honeysuckle" in the United States, and is considered an invasive species.
The loquat is a large evergreen shrub or tree grown commercially for its orange fruit. It is also cultivated as an ornamental plant.
Saponins are bitter-tasting, usually toxic plant-derived secondary metabolites. They are organic chemicals and have a foamy quality when agitated in water and a high molecular weight. They are present in a wide range of plant species throughout the bark, leaves, stems, roots and flowers but particularly in soapwort, a flowering plant, the soapbark tree, common corn-cockle, baby's breath and soybeans. They are used in soaps, medicines, fire extinguishers, dietary supplements, steroid synthesis, and in carbonated beverages. Saponins are both water and fat soluble, which gives them their useful soap properties. Some examples of these chemicals are glycyrrhizin and quillaia, a bark extract used in beverages.
Lilium speciosum is an East Asian species of plants in the lily family. It is native to southern Japan and southern China, where it can be found at elevations of 600–900 metres (2,000–3,000 ft). It is sometimes called the Japanese lily though there are other species with this common name.
Triosteum, commonly known in American English as horse-gentian or, less commonly, feverwort, and, in Standard Chinese as 莛子藨属, is a genus of flowering plants belonging to the family Caprifoliaceae. A genus of six species in total, it has three species native to North America, and three more in eastern Asia.
Lonicera caerulea, also known by its common names blue honeysuckle, sweetberry honeysuckle, fly honeysuckle, blue-berried honeysuckle, or the honeyberry, is a non-climbing honeysuckle native throughout the cool temperate Northern Hemisphere regions of North America, Europe, and Asia.
Asclepias curassavica, commonly known as tropical milkweed, is a flowering plant species of the milkweed genus, Asclepias. It is native to the American tropics and has a pantropical distribution as an introduced species. Other common names include bloodflower or blood flower, cotton bush, hierba de la cucaracha, Mexican butterfly weed, redhead, scarlet milkweed, and wild ipecacuanha.
Lonicera involucrata, the bearberry honeysuckle, bracted honeysuckle, twinberry honeysuckle, Californian Honeysuckle, twin-berry, or black twinberry, is a species of honeysuckle native to northern and western North America.
Lonicera maackii, the Amur honeysuckle, is a species of honeysuckle in the family Caprifoliaceae that is native to temperate eastern Asia; specifically in northern and western China south to Yunnan, Mongolia, Primorsky Krai in southeastern Siberia, Korea, and, albeit rare there, central and northern Honshū, Japan.
Anemone hepatica, the common hepatica, liverwort, liverleaf, kidneywort, or pennywort, is a species of flowering plant in the buttercup family Ranunculaceae, native to woodland in temperate regions of the Northern Hemisphere. This herbaceous perennial grows from a rhizome.
The perennial vine Lonicera hispidula is a species of honeysuckle known as pink honeysuckle and, less often, California honeysuckle. It is a low-elevation woodlands shrub or vine domestically grown, specifically found on the West Coast of North America.
Lonicera sempervirens is a flowering plant species of honeysuckle vine native to the eastern United States which is known for its reddish flowers.
Cornus officinalis, the Japanese cornel or Japanese cornelian cherry, is a species of flowering plant in the dogwood family Cornaceae. Despite its name, it is native to China and Korea as well as Japan. It is not to be confused with C. mas, which is also known as the Cornelian cherry. It is not closely related to the true cherries of the genus Prunus.
Cynaroside is a flavone, a flavonoid-like chemical compound. It is a 7-O-glucoside of luteolin.
Trachelospermum asiaticum, the Asiatic jasmine, is a species of flowering plant in the family Apocynaceae and it is native to Asia. Its flowers resemble stars, so it is also referred to as yellow star jasmine or Asian star jasmine. This is a fast growing evergreen vine, often used to cover fences, walls, and similar surfaces. It is heat- and cold- tolerant, and grows even in shady areas.
Limenitis glorifica, commonly known as the Honshu White Admiral, is a butterfly in the family Nymphalidae. L. glorifica is endemic to the island of Honshu, in Japan, where it is found in temperate open or shrubland habitats. L. glorifica was intentionally introduced into New Zealand as biological control for Japanese honeysuckle plants.
Phlomoides tuberosa, the sage-leaf mullein, is a perennial herbaceous flowering plant in the family Lamiaceae, native to China, Kazakhstan, Kyrgyzstan, Mongolia, Russia; SW Asia and Europe. Enlarged, tuberous roots give rise to erect stems to 150 cm bearing purple-red flowers.
Lonicera similis is a species of flowering plant in the family Caprifoliaceae, native to Western China. This honeysuckle is known in cultivation by the variety delavayi which is reported by some authorities to be synonymous with L. similis itself. It is a large, twining, semi-evergreen shrub growing to 8 m (26 ft) tall by 1.5 m (4.9 ft) broad, with a profusion of fragrant tubular flowers opening white and ageing to yellow, in late summer and autumn. The flowers are followed by black berries. The Latin specific epithet similis means "similar to". It is similar in appearance to L. japonica, but larger and more robust. The name delavayi honours the French missionary and botanist Père Jean Marie Delavay (1834-1895).