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boronia_megastigma_nees_ex_bartl [2015/07/20 12:07]
andreas
boronia_megastigma_nees_ex_bartl [2019/04/27 12:35] (aktuell)
andreas
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 Erect shrub, up to 2m tall, native to Western Asutralia, cultivated there; laeves linear, dark green, up to 1.5cm long; flowers dark reddish-purple to brown externally and bright yellow inside. \\ Erect shrub, up to 2m tall, native to Western Asutralia, cultivated there; laeves linear, dark green, up to 1.5cm long; flowers dark reddish-purple to brown externally and bright yellow inside. \\
 [[http://​florabase.dpaw.wa.gov.au/​browse/​profile/​4428]] [[http://​florabase.dpaw.wa.gov.au/​browse/​profile/​4428]]
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 +"​B.megastigma is a small shrub which rarely exceeds a metre in height. It has small leaves which are also aromatic and small cup-shaped flowers which occur in the leaf axils in spring. The flowers are about 80-100 mm diameter. In the normal form of this plant, the exterior of the petals is a deep chocolate-brown in colour while the interior is bright yellow. A number of cultivars have been selected which have more attractively coloured flowers while retaining the fragrance. These include: Lutea - yellow both internally and externally; Chandleri - burgundy-red on the outside, yellow inside; Harlequin - striped yellow and brown on the outside, yellow inside."​ \\
 +[[http://​anpsa.org.au/​b-meg.html]]
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 +"For flavor and fragrance use, the flowers of Boronia megastigma are collected, extracted with petroleum ether (a hydrocarbon fraction), concentrated into a waxy concentrate (a concrete) and then the concrete is re-extracted with alcohol, and concentrated to form Boronia absolute. The absolute is typically a dark green semi-fluid liquid that possesses a fruity, tea-like, slightly herbaceous odor. In perfumes, boronia is used in violet, mimosa and honeysuckle bases, while for flavors it adds body and naturalness to flavors such as raspberry, strawberry, peach, etc." \\
 +[[http://​www.leffingwell.com/​boronia.htm]]
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 +"The petal waxes clearly contribute the bulk of the weight of the concrete from Boronia flowers, and the C17 to C33 saturated branched and linear hydrocarbons represent the proportion of these waxes amenable to GC analysis."​ \\
 +Volatiles of the fraction to C20 (representing 16.0-25.9% of the concrete) were mainly α-pinene (2.3-11.0%),​ β-pinene (1.5-15.0%),​ limonene (1.0-2.7%), linalool (0.9-1.7%), β-ionone (11.9-22.5%),​ dodecyl acetate (5.6-11.1%),​ methyl jasmonate (3.4-7.2%), and (Z)-heptadec-8-ene (19.7-31.2%). Minor components included α-ionone, dihydro-β-ionone,​ 5,6-epoxy ionone, tetrahydroionone,​ and isoamyl salicylate e.g. \\
 +[Davies, N. W., and R. C. Menary. "​Volatile constituents of Boronia megastigma flowers."​ Perfumer and flavorist 8 (1983): 3-8] [[https://​core.ac.uk/​download/​pdf/​33330178.pdf#​page=222]] ​  
  
 Constituents of the absolute of B.megastigma from Tasmania were β-ionone and many of its derivatives like 7,​8-dihydro-β-ionone,​ 7,​8-dihydro-β-ionol,​ 4-oxo-β-ionone,​ 4-hydroxy-β-ionone,​ 4-oxo-β-ionol,​ and 3-hydroxy-β-ionone as well as isomeric 3-hydroxymegastigm-7-en-9-ones and megastigm-7-ene-3,​9-dione. Furthermore,​ methyl (Z,​E)-4-(geranyloxy)cinnamates,​ methyl (Z,​E)-4-(5-hydroxy-geranyloxy)-cinnamates,​ alkyl esters of 8-hydroxylinalool,​ and N-[2-(4-prenyloxyphenyl)ethyl]tiglamide were identified. \\ Constituents of the absolute of B.megastigma from Tasmania were β-ionone and many of its derivatives like 7,​8-dihydro-β-ionone,​ 7,​8-dihydro-β-ionol,​ 4-oxo-β-ionone,​ 4-hydroxy-β-ionone,​ 4-oxo-β-ionol,​ and 3-hydroxy-β-ionone as well as isomeric 3-hydroxymegastigm-7-en-9-ones and megastigm-7-ene-3,​9-dione. Furthermore,​ methyl (Z,​E)-4-(geranyloxy)cinnamates,​ methyl (Z,​E)-4-(5-hydroxy-geranyloxy)-cinnamates,​ alkyl esters of 8-hydroxylinalool,​ and N-[2-(4-prenyloxyphenyl)ethyl]tiglamide were identified. \\
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-{{:​boronia_megastigma.jpg?​500}} \\+{{:​boronia_megastigma.jpg?​600}} \\
 Curtis’s Botanical Magazine, vol.99 [ser.3, vol.29] t.6046 (1873) [W.H.Fitch] \\ Curtis’s Botanical Magazine, vol.99 [ser.3, vol.29] t.6046 (1873) [W.H.Fitch] \\
 [[http://​plantgenera.org/​species.php?​id_species=150942]] [[http://​plantgenera.org/​species.php?​id_species=150942]]
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 +{{:​boronia_megastigma_ericlux.jpg}} \\
 +Boronia megastigma (labelled as: 'Jack Maguire'​s Red'); author: Eric Lux/ Flickr [[https://​creativecommons.org/​licenses/​by-nc-sa/​2.0/​|CC BY-SA 2.0]] \\
 +[[https://​www.abc.net.au/​news/​rural/​2015-01-23/​boronia-megastigma/​6041064]]
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boronia_megastigma_nees_ex_bartl.txt · Zuletzt geändert: 2019/04/27 12:35 von andreas