Mandragora autumnalis

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Mandragora autumnalis
Duda.JPG
Photographed in Israel
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Solanaceae
Genus: Mandragora
Species:
M. autumnalis
Binomial name
Mandragora autumnalis
Bertol. [1]
Closer view of the flowers PikiWiki Israel 34204 Mandragora Autumnalis.JPG
Closer view of the flowers
Ripening fruit Mandragora autumnalis - ripe fruit.jpg
Ripening fruit

Mandragora autumnalis, known as mandrake [2] or autumn mandrake, [3] is recognized by some sources as a separate species from Mandragora officinarum , although with different circumscriptions. Others regard it as merely part of this very variable species. Plants given the name Mandragora autumnalis consist of a rosette of leaves up to 60 cm (2 ft) across, close to the ground, with a central group of usually purplish flowers followed by yellow or orange berries. The large tap-roots as well as the leaves contain alkaloids and are toxic. They have traditional uses as herbal medicines.

Contents

Description

The boundary between the two species Mandragora autumnalis and Mandragora officinarum varies among authors, with some regarding them as the same species (see § Taxonomy below). Whatever distinction is used, plants of M. autumnalis are herbaceous perennials, with a large upright tap-root, often branched and sometimes shaped somewhat like a person. There is little or no stem, the leaves being borne in a basal rosette up to 60 cm (2 ft) across. The flowers are clustered at the centre of the rosette, each with five sepals, five petals and five stamens. Both the sepals and petals are fused at the base forming two five-lobed bell-shaped cups. The ovary has two chambers (locules) and a long style. The fruit is a fleshy berry with many seeds. [4] [5]

For those authors who regard Mandragora autumnalis as the main species found around the Mediterranean, it has flowers varying in colour but typically violet or purple, 30–40 mm (1–2 in) long, and berries that are yellow or orange and egg-shaped, while the much less widespread Mandragora officinarum has somewhat smaller flowers, greenish-white in colour, and berries that are yellow and globe-shaped. [5] [2] Those who regard M. officinarum as the main species found around the Mediterranean, with M. autumnalis being found only in the Levant, use the size of the seeds as one of the distinguishing factors, those of M. autumnalis being more than twice the size of those of M. officinarum. [6] In Israel, where the native taxon is M. autumnalis in both approaches, it flowers between December and February, i.e. not only in the autumn as the specific epithet might suggest. [7]

Taxonomy

In 1753, in the first edition of Species Plantarum , Carl Linnaeus described a single species, Mandragora officinarum , for plants found around the Mediterranean. [8] [9] Jackson and Berry (1979) [10] and Ungricht et al. (1998) [4] have documented the subsequent confusion over the number of Mediterranean species of Mandragora and their scientific names. Antonio Bertoloni used flowering time to name two species: Mandragora autumnalis, the autumn-flowering mandrake, in 1820, [1] and Mandragora vernalis, the spring-flowering mandrake, in 1824. [11] M. vernalis is considered to be the same as Linnaeus's M. officinarum. [4] Three interpretations of Mandragora autumnalis are in use:

Distribution

In one treatment, Mandragora autumnalis is the main species of Mandragora found all around the Mediterranean, in Tunisia, Algeria, Morocco, southern Portugal, southern Spain, southern Italy, Greece, Cyprus, Turkey, Syria, Lebanon, Israel, and Jordan, being absent in northern Italy and a region on the coast of former Yugoslavia, where it is replaced by M. officinarum. [5] [2] [4] In another treatment, Mandragora autumnalis is native only to the Levant (from Syria south to Israel), the species found elsewhere around the Mediterranean being M. officinarum. [6]

Toxicity and use

All species of Mandragora contain highly biologically active alkaloids, tropane alkaloids in particular. Jackson and Berry were unable to find any differences in the composition of these chemicals between Mandragora autumnalis and Mandragora officinarum (using the broader definition of M. autumnalis). Alkaloids present included hyoscyamine, hyoscine, cuscohygrine, apoatropine, 3-alpha-tigloyloxytropane, 3-alpha,6-beta-ditigloyloxytropane and belladonnine. Non-alkaloid constituents included sitosterol and beta-methylesculetin (scopoletin). [10]

The alkaloids make the plant, particularly the root and leaves, poisonous. Clinical reports of the effects of consumption of Mandragora autumnalis include severe symptoms similar to those of atropine poisoning, including blurred vision, dilation of the pupils (mydriasis), dryness of the mouth, difficulty in urinating, dizziness, headache, vomiting, blushing and a rapid heart rate (tachycardia). Hyperactivity and hallucinations also occurred in the majority of patients. [12] [13]

Mandragora species have a long use in traditional medicine, an extract being used for its real or supposed aphrodisiac, hypnotic, emetic, purgative, sedative and pain-killing effects. Tropane alkaloids are known to be effective as analgesics and anaesthetics, and can be used to increase circulation and dilate pupils, among other effects. [4] Continued use of M. autumnalis in folk medicine was reported in Sicily in 2014. [14]

Related Research Articles

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Mandragora officinarum is the type species of the plant genus Mandragora in the nightshade family Solanaceae. It is often known as mandrake, although this name is also used for other plants. As of 2015, sources differed significantly in the species they use for Mandragora plants native to the Mediterranean region. The main species found around the Mediterranean is called Mandragora autumnalis, the autumn mandrake. In a broader circumscription, all the plants native to the regions around the Mediterranean Sea are placed in M. officinarum, which thus includes M. autumnalis. The names autumn mandrake and Mediterranean mandrake are then used. Whatever the circumscription, Mandragora officinarum is a perennial herbaceous plant with ovate leaves arranged in a rosette, a thick upright root, often branched, and bell-shaped flowers followed by yellow or orange berries.

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References

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