Linaria

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Linaria
Bombus ruderarius - Linaria vulgaris - Valingu2.jpg
Common toadflax (Linaria vulgaris)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Plantaginaceae
Tribe: Antirrhineae
Genus: Linaria
Mill.
Species

See text

Synonyms
  • ElatineHill
  • PeloriaAdans.
  • SacculariaKellogg
  • Trimerocalyx(Murb.) Murb.

Linaria is a genus of almost 200 species of flowering plants, one of several related groups commonly called toadflax. They are annuals and herbaceous perennials, and the largest genus in the Antirrhineae tribe of the plantain family Plantaginaceae.

Contents

Taxonomy

Linaria was traditionally placed in the family Scrophulariaceae. Phylogenetic analysis has now placed it in the vastly expanded family Plantaginaceae.

Closely related genera include Nuttallanthus (American toadflaxes, recently split from Linaria), Antirrhinum (snapdragons) and Cymbalaria (ivy-leaved toadflaxes).

Cultivation

Several Linaria species are cultivated as garden plants, and some are regarded as having a weedy habit.

Species

The following species are recognised in the genus Linaria: [3]

Etymology

The members of this genus are known in English as toadflax, a name shared with several related genera. The 'toad' in toadflax may relate to the plants having historically been used to treat bubonic plague, a false link having been drawn between the words 'bubo' and 'Bufo'. The scientific name Linaria means "resembling linum" (flax), which the foliage of some species superficially resembles.

Distribution and habitat

The genus is native to temperate regions of Europe, northern Africa and Asia, with the highest species diversity in the Mediterranean region.

Ecology

Some Linaria are regarded as noxious weeds. They are likely toxic to livestock, but ruminants generally avoid them. [4]

Chemical composition

Linaria species are rich in alkaloids, iridoids, terpenes, phenolic acids and flavonoids.

Vasicine, vasicinone, 7-hyrdoxyvasicine, linarinic acid, choline, linavuline, luteolin, acacetin, apigenin, chrysin, quercetin, myricetin, linarioside, aucubin, linaride, iridolinaroside A-D, and iridolinarin A-C are some compounds found in plants of this genus. [5]

Uses

Toadflaxes are used as food plants by the larvae of some Lepidoptera species, including the mouse moth (Amphipyra tragopoginis) and the common buckeye (Junonia coenia).

Traditional medicine

Linaria vulgaris has been used as a medicinal herb. [6]

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<i>Linaria dalmatica</i> Species of flowering plant

Linaria dalmatica is a herbaceous, short-lived perennial plant native to western Asia and southeastern Europe that has become a weed in other areas. The family this plant now belongs to is the Plantaginaceae Family. Previously, it belonged to the Scrophulariaceae (Figwort) family. Its common names include Balkan toadflax, broadleaf toadflax, and Dalmatian toadflax. Linaria dalmatica has unique yellow flowers with an orange center that draw individuals to purchase them to display in their gardens. The distribution of L. dalmatica to North America can be attributed to use as a fabric dye, folk remedies and as an ornamental plant. However, it is now classified as a weed in both Canada and the U.S.

<span class="mw-page-title-main">Antirrhineae</span> Tribe of flowering plants

The Antirrhineae are one of the 12 tribes of the family Plantaginaceae. It contains the toadflax relatives, such as snapdragons.

References

  1. Brickell, Christopher, ed. (2008). The Royal Horticultural Society A-Z Encyclopedia of Garden Plants. United Kingdom: Dorling Kindersley. p. 636. ISBN   9781405332965.
  2. Dalmatian Toadflax (Linaria dalmatica). National Invasive Species Information Center, United States National Agricultural Library.
  3. "Linaria Mill. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2022-07-04.
  4. Sing, S. E. and R. K. Peterson. (2011). Assessing environmental risks for established invasive weeds: Dalmatian (Linaria dalmatica) and yellow (L. vulgaris) toadflax in North America. International Journal of Environmental Research and Public Health 8(7) 2828-53.
  5. "Chemical constituents and biological activities of the genus Linaria (Scrophulariaceae)".
  6. Duke, J. A. Ethnobotanical uses: Linaria vulgaris. Dr. Duke's Phytochemical and Ethnobotanical Databases.

Bibliography