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Galeopsis bifida

Galéopsis bifide (Galeopsis bifida) - Lamiaceae

Galeopsis bifida

Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Magnoliopsida
Ordo: Lamiales
Familia: Lamiaceae
Subfamilia: Lamioideae
Genus: Galeopsis
Species: Galeopsis bifida

Name

Galeopsis bifida Boenn.

References

ITIS


Vernacular names
Deutsch: Zweispaltiger Hohlzahn
Hornjoserbsce: Lěsny zabrij
Lietuvių: Mažažiedė aklė
Nederlands: Gespleten hennepnetel
Suomi: Peltopillike
Svenska: Toppdån

Galeopsis bifida is an annual plant native to Europe and Asia but now found in Canada and the northeastern, midwestern parts of the United States. It has many common names such as bifid hemp-nettle,[1] split-lip hemp-nettle, common hemp-nettle,[1] and large-flowered hemp-nettle.[1] The genus name means weasel-like, referring to the corolla of the flower. It is often confused with other species of Lamiaceae such as Mentha arvensis, Dracocephalum parviflorum and Stachys pilosa.[2]

Distribution
Distribution of Galeopsis bifida in the United States

Galeopsis bifida naturally occurs throughout Canada, the northeastern and midwestern parts of the United States, and has been introduced to Alaska.[2] It was also introduced in some parts of New Zealand and the Canary Islands.
Habitat and Ecology

Hempnettle mostly grow in disturbed sites, roadsides, gardens, agricultural lands, wet heaths and sometimes in woods. It creates a dense mid-forb layer dominating the regular grass and low forbs. It utilizes limited nutrients and requires moist soil, usually prefers moderate levels of acid and basic soils.[2][3]
Morphology

Hempnettle could grow up to 1 meter high. Its leaves and flowers are hairy. Leaves are simple, 1 to 5 inches long, opposite, margins are serrate and ovate in shape, pubescent on both sides. The stem is swollen below the leaf nodes. Its flowers can be purple, white or pink and are terminal in axillary clusters.[2]
Flowers and fruit

Like other Lamiaceae, its corolla is bilabiate meaning that it has two lips, an upper lip and a lower lip. The upper lip has one lobe and the lower lip has three lobes covered with hair on the lower side of the lobe. The flowers are bell shaped and bilaterally symmetrical, ranging in size from about one half to three fourths of an inch. The pistil consists of two fused carpels; its stigma is two-lobed. There are four stamens, two long and two short. Its style is solitary. Its flowering time is late summer to autumn. Its fruit is a schizocarp, brown in color.[1] This plant is self pollinated, each plant with a capacity of producing up to 2,800 seeds which can remain dormant under soil for several years. The seeds are large; dispersal is via mammal fur. Germination occurs when the seeds are brought near to the soil surface[2] and it takes place within a month.[1]
Usage

There aren't any medicinal uses for this plant but the oil obtained from the seeds is used as a polish for leather.
Toxicity

This plant is very poisonous and could cause paralysis.[3] It has been declared noxious in Manitoba, Alberta, Quebec and some parts of Alaska.[2]
References

^ a b c d e "Bifid Hemp-nettle". Naturegate. Retrieved 29July 2011.
^ a b c d e f Invasive Plants Of Alaska. AKEPIC. 2005. ISBN 0-16-073253-0.
^ a b "Galeopsis bifida - Boenn.". PFAF. Retrieved 30 July 2011.

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Source: Wikipedia, Wikispecies: All text is available under the terms of the GNU Free Documentation License