![Ruta angustifolia MHNT](https://upload.wikimedia.org/wikipedia/commons/b/b7/Ruta_angustifolia_MHNT.BOT.2008.1.4.jpg)
''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, which ...
subshrub
A subshrub (Latin ''suffrutex'') or dwarf shrub is a short shrub, and is a woody plant. Prostrate shrub is a related term. "Subshrub" is often used interchangeably with "bush".Jackson, Benjamin, Daydon; A Glossary of Botanic Terms with their Der ...
s, 20–60 cm tall, in the family
Rutaceae
The Rutaceae is a family, commonly known as the rue[RUTACEAE](_blank)
in BoDD – Botanical Derm ...
, 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 the e ...
region,
Macaronesia
Macaronesia (Portuguese: ''Macaronésia,'' Spanish: ''Macaronesia'') is a collection of four volcanic archipelagos in the North Atlantic, off the coasts of Africa and Europe. Each archipelago is made up of a number of List of islands in the At ...
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 area ...
. About ten species are accepted in the genus. The most well-known species is ''
Ruta graveolens
''Ruta graveolens'', commonly known as rue, common rue or herb-of-grace, is a species of '' Ruta'' grown as an ornamental plant and herb. It is native to the Balkan Peninsula. It is grown throughout the world in gardens, especially for its blui ...
'' (rue or common rue).
The
leaves
A leaf (plural, : leaves) is any of the principal appendages of a vascular plant plant stem, stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", wh ...
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 mechani ...
s are yellow, with 4–5
petal
Petals are modified Leaf, leaves that surround the reproductive parts of flowers. They are often advertising coloration, brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''c ...
s, 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 particu ...
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 angiospe ...
s.
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. ...
''
Pers.
*''
Ruta chalepensis
file:Ruta chalepensis Dried fruits Tigray Region Ethiopia.jpg, 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 fou ...
''
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. ...
''
DC.
*''
Ruta graveolens
''Ruta graveolens'', commonly known as rue, common rue or herb-of-grace, is a species of '' Ruta'' grown as an ornamental plant and herb. It is native to the Balkan Peninsula. It is grown throughout the world in gardens, especially for its blui ...
''
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. ...
''
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. ...
''
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. ...
''
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. ...
''
(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. ...
''
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. ...
''
L.f.
Medicinal uses
![Effet de la rue officinale](https://upload.wikimedia.org/wikipedia/commons/3/36/Effet_de_la_rue_officinale.jpg)
Extracts from rue have been used to treat
eyestrain
Eye strain, also known as asthenopia (from Greek ''a-sthen-opia'', grc, ἀσθενωπία, ), is a common eye condition that manifests through non-specific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache, and ...
,
sore eyes
Conjunctivitis, also known as pink eye, is inflammation of the outermost layer of the white part of the eye and the inner surface of the eyelid. It makes the eye appear pink or reddish. Pain, burning, scratchiness, or itchiness may occur. The ...
, and as
insect repellent
An insect repellent (also commonly called "bug spray") is a substance applied to skin, clothing, or other surfaces to discourage insects (and arthropods in general) from landing or climbing on that surface. Insect repellents help prevent and cont ...
.
Rue has been used internally as an
antispasmodic
An antispasmodic (synonym: spasmolytic) is a pharmaceutical drug or other agent that suppresses muscle spasms.
Smooth muscle spasm
One type of antispasmodics is used for smooth muscle relaxation, especially in tubular organs of the gastrointesti ...
, 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 t ...
.
''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
Grappa is an alcoholic beverage: a fragrant, grape-based pomace brandy of Italian origin that contains 35 to 60 percent alcohol by volume (70 to 120 US proof).
Grappa is made by distilling the skins, pulp, seeds, and stems (i.e., the poma ...
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