''Ruta'' (commonly known as rue) is a genus of strongly scented

evergreen In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, whic ...

subshrubs, 20–60 cm tall, in the family Rutaceae, native to the

Mediterranean The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on ...

region, Macaronesia and southwest

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ...

. About ten species are accepted in the genus. The most well-known species is '' Ruta graveolens'' (rue or common rue). The leaves are bipinnate or tripinnate, with a feathery appearance, and green to strongly glaucous blue-green in colour. The

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanis ...

s are yellow, with 4–5 petals, about 1 cm diameter, and borne in cymes. The

fruit In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering. Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in partic ...

is a 4–5-lobed capsule, containing numerous

seed A seed is an embryonic plant enclosed in a protective outer covering, along with a food reserve. The formation of the seed is a part of the process of reproduction in seed plants, the spermatophytes, including the gymnosperm and angiosper ...

Species

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

accepted ten species: *''

Ruta angustifolia ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' Pers. *''

Ruta chalepensis Dried fruits. ''Ruta chalepensis'' is a species of flowering plant in the Rutaceae family known by the common name fringed rue. It is native to Eurasia and North Africa. It has been found elsewhere as an introduced species. It is a perennial herb ...

'' L. *''

Ruta corsica ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' DC. *'' Ruta graveolens'' L. *''

Ruta lamarmorae ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' Bacch., Brullo & Giusso *''

Ruta lindsayi ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' Turrill *''

Ruta microcarpa ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' Svent. *''

Ruta montana ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' (L.) L. *''

Ruta oreojasme ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' Webb *''

Ruta pinnata ''Ruta'' (commonly known as rue) is a genus of strongly scented evergreen subshrubs, 20–60 cm tall, in the family Rutaceae, native to the Mediterranean region, Macaronesia and southwest Asia. About ten species are accepted in the genus. T ...

'' L.f.

Medicinal uses

Extracts from rue have been used to treat eyestrain, sore eyes, and as insect repellent. Rue has been used internally as an antispasmodic, as a treatment for

menstrual The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that make pregnancy possible. The ovarian cycle controls the production and release of eggs a ...

problems, as an

abortifacient An abortifacient ("that which will cause a miscarriage" from Latin: '' abortus'' "miscarriage" and '' faciens'' "making") is a substance that induces abortion. This is a nonspecific term which may refer to any number of substances or medications, ...

, and as a

sedative A sedative or tranquilliser is a substance that induces sedation by reducing irritability or excitement. They are CNS depressants and interact with brain activity causing its deceleration. Various kinds of sedatives can be distinguished, but ...

. ''Ruta graveolens'' and ''Ruta chalepensis'' are often confused in scientific literature.

Traditional uses

Since medieval times, rue has been used as an additive to wines (both white and red) to enhance its flavour and its keeping properties. The Dutch name ''wijnruit'', translates as wine rue. In Italy, rue is added to grappa to produce Grappa alla Ruta. Rue's toxicity has long been known but since it appears to be slight it has been used as an additive in wine for a long time.

Precautions

Caution should be taken with using rue topically. Applied to the skin with sun exposure, the oil and leaves can cause blistering. Some people are much more sensitive than others.

References

{{Taxonbar, from=Q165250 Rutaceae genera Herbs Medicinal plants