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

Contents

1 Description 2 Volatile oils 3 Cultivation 4 Toxicity 5 Chemistry 6 Gallery 7 References 8 External links

Description[edit] 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.[2] Volatile oils[edit] In the summer months, the whole plant is covered with a kind of flammable substance, which is gluey to the touch, and has a very fragrant, lemony aroma; but if it takes fire, it goes off with a flash all over the plant. The name "burning bush" derives from the volatile oils produced by the plant, which can catch fire readily in hot weather, 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
Carl Linnaeus
is said to have ignited the air once, at the end of a particularly hot, windless summer day, above Dictamnus
Dictamnus
plants, using a simple matchstick. The volatile oils have a reputed component of isoprene. Cultivation[edit] 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
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
Dictamnus
is rarely seen in American gardens. Toxicity[edit] 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 photodermatitis.[2] Chemistry[edit] More than 100 chemical constituents have been isolated from the genus Dictamnus, including alkaloids, limonoid triterpenoids, flavonoids, sesquiterpenoids, coumarins, and phenylpropane.[6] Gallery[edit]

Illustration of Dictamnus
Dictamnus
albus, from Flora von Deutschland, Österreich und der Schweiz 1885

Plant of Dictamnus
Dictamnus
albus purpureus

Inflorescence of Dictamnus
Dictamnus
albus purpureus

Close-up on a flowers of Dictamnus
Dictamnus
albus purpureus

Fruit of Dictamnus
Dictamnus
albus

Leaves of Dictamnus
Dictamnus
albus, which give rise to the common name "Fraxinella" ("little ash)"

References[edit]

^ The Plant List: A Working List of All Plant Species, retrieved 23 June 2016  ^ a b c RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.  ^ a b c d " Dictamnus
Dictamnus
albus". Germplasm Resources Information Network (GRIN). Agricultural Research Service
Agricultural Research Service
(ARS), United States Department of Agriculture (USDA). Retrieved 24 June 2015.  ^ " Dictamnus
Dictamnus
albus var. purpureus". Royal Horticultural Society. Retrieved 24 July 2013.  ^ "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 29. Retrieved 6 February 2018.  ^ 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. 

External links[edit]

Wikimedia Commons has media related to Dictamnus
Dictamnus
albus.

Growing a Burning Bush, Dictamnus
Dictamnus
albus, in your Garden Dictamnus
Dictamnus
- Gas Plant, Burning Bush, Perennials Guide to Planting Flowers

Taxon identifiers

Wd: Q2643074 EoL: 61908 EPPO: 1DCMG FoC: 110003 GRIN: 3646 iNaturalist: 129871 IPNI: 35678-1 ITIS: 500242 NCBI: 77005 PLANTS: DICTA Tropic

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