Dictamnus albus

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Dictamnus albus
Dictamnus albus LC0401.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Dictamnus
Species:
D. albus
Binomial name
Dictamnus albus
L.
Synonyms [1]
Synonyms list

Dictamnus albus is a species of flowering plant in the family Rutaceae. It is also known as burning bush, [2] dittany, [2] gas plant [2] or fraxinella. [2] This herbaceous perennial has several geographical variants. [3] It is native to warm, open woodland habitats in southern Europe, north Africa and much of Asia.

Contents

Description

This plant grows about 40 cm (16 in) to 100 cm (39 in) high. Its flowers form a loose pyramidal spike and vary in colour from pale purple to white. The flowers are five-petalled with long projecting stamens. The leaves resemble those of an ash tree. [3]

Cultivation

Several varieties and cultivars have been selected for garden use. The variety D. albus var. purpureus in which the violet-purple is confined to veining of white petals with a slight blush, has gained the Royal Horticultural Society's Award of Garden Merit. [4] [5] Dictamnus is tap-rooted, making mature plants difficult to establish and resistant to division; young plants often need three years before they begin to flower, and since it is late to break into leaf in spring, even quite mature clumps may be harmed with vigorous soil-working in spring. For all these reasons, added to toxicity of the foliage, Dictamnus is rarely seen in American gardens.[ citation needed ]

Toxicity

The leaves have a bitter and unpalatable taste. Despite the lemon-like smell, the plant is acrid when eaten. All parts of the plant may cause mild stomach upset if eaten, and contact with the foliage may cause phytophotodermatitis. [3]

Volatile oils

The name "burning bush" derives from the volatile oils produced by the plant, which can catch fire readily in hot weather, [6] leading to comparisons with the burning bush of the Bible, including the suggestion that this is the plant involved there. The daughter of Swedish botanist Carl Linnaeus is said to have ignited the air once, at the end of a particularly hot, windless summer day, above Dictamnus plants, using a simple matchstick. The volatile oils have a reputed component of isoprene.

Chemistry

More than 100 chemical constituents have been isolated from the genus Dictamnus, including alkaloids, limonoid triterpenoids, flavonoids, sesquiterpenoids, coumarins, and Phenylpropanoids. [7]

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References

  1. "Dictamnus albus L.". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-09-21.
  2. 1 2 3 4 "Dictamnus albus". Germplasm Resources Information Network . Agricultural Research Service, United States Department of Agriculture . Retrieved 24 June 2015.
  3. 1 2 3 RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN   978-1405332965.
  4. "Dictamnus albus var. purpureus". Royal Horticultural Society. Retrieved 24 July 2013.[ permanent dead link ]
  5. "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 29. Retrieved 6 February 2018.
  6. "Dictamnus albus - Plant Finder".
  7. Gao X.; Zhao P.-H.; Hu J.-F. (2011). "Chemical constituents of plants from the genus Dictamnus". Chemistry and Biodiversity. 8 (7): 1234–1244. doi:10.1002/cbdv.201000132. PMID   21766445. S2CID   46187608.