| Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | |
| asclepias_speciosa_torr [2017/10/18 13:22] – andreas | asclepias_speciosa_torr [2026/02/04 08:56] (aktuell) – andreas |
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| Asclepias speciosa Torr. - Apocynaceae - showy milkweed, **Schöne Seidenpflanze** | Asclepias speciosa Torr. - Apocynaceae - showy milkweed, **Schöne Seidenpflanze** |
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| Perennial herb, up to 60-100cm high, native to western and central North America. | Perennial herb, up to 30-125cm high, native to western and central North America; leaves opposite, petiolate, lanceolate or ovate to oblong; inflorescences extra-axillary, pedunculate, many-flowered; corolla dark pink (rarely pale), lobes reflexed with spreading tips; flowers emit a sweet fragrance that attracts bees, butterflies, and hummingbirds. [[http://efloras.org/florataxon.aspx?flora_id=1&taxon_id=250131243|efloras.org]] |
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| "The eye-catching furry pale pink to pinkish-purple flowers are arranged in thick umbels... Asclepias speciosa is a specific Monarch butterfly food and habitat plant." [[http://en.wikipedia.org/wiki/Asclepias_speciosa]] | "The eye-catching furry pale pink to pinkish-purple flowers are arranged in thick umbels... Asclepias speciosa is a specific Monarch butterfly food and habitat plant." [[http://en.wikipedia.org/wiki/Asclepias_speciosa|wikipedia]] |
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| "Asclepias speciosa occurs on mountain meadows, open woods and along rivers, and in cultivated land. It grows widely on roadsides and along the railway lines. Asclepias speciosa grows at altitudes 1500-2600 meters." [[http://de.wikipedia.org/wiki/Asclepias_speciosa]] | |
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| |{{:ocimene_e_beta.jpg|(E)-ocimene}} \\ (E)-ocimene \\ //(sweet herbal)// | {{:benzaldehyde.jpg|benzaldehyde}} \\ benzaldehyde \\ //(cherry-like)// | {{:phenylacetaldehyde.jpg|phenylacetaldehyde}} \\ phenylacetaldehyde \\ //(green-floral, honey)// | | |{{:ocimene_e_beta.jpg|(E)-ocimene}} \\ (E)-ocimene \\ //(sweet herbal)// | {{:benzaldehyde.jpg|benzaldehyde}} \\ benzaldehyde \\ //(cherry-like)// | {{:phenylacetaldehyde.jpg|phenylacetaldehyde}} \\ phenylacetaldehyde \\ //(green-floral, honey)// | |
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| "Six compounds comprised >90% of the milkweed floral components in the pentane extract: (E)-β-ocimene, benzaldehyde, nonanal, benzyl alcohol, phenylacetaldehyde, and (E)-2-nonenal. The volatile profile collected by DVB/CAR/PDMS SPME directly from fresh flowers was dominated by three of these compounds, (E)-β-ocimene, benzaldehyde, and phenylacetaldehyde (>75% of the total), but there were also substantial differences compared to the extract. Most notably, (E,Z)- and (E,E)-alloocimene were collected from the flower headspace, but were almost completely absent from the extract, while nonanal, a major constituent of flower extract, was missing in the headspace. These disparities can be partly explained by variation in volatility among the components, but may also reflect actual differences between the chemical composition in flower tissue and what is released." \\ | "Six compounds comprised >90% of the milkweed floral components in the pentane extract: (E)-β-ocimene, benzaldehyde, nonanal, benzyl alcohol, phenylacetaldehyde, and (E)-2-nonenal. The volatile profile collected by DVB/CAR/PDMS SPME directly from fresh flowers was dominated by three of these compounds, (E)-β-ocimene, benzaldehyde, and phenylacetaldehyde (>75% of the total), but there were also substantial differences compared to the extract. Most notably, (E,Z)- and (E,E)-alloocimene were collected from the flower headspace, but were almost completely absent from the extract, while nonanal, a major constituent of flower extract, was missing in the headspace. These disparities can be partly explained by variation in volatility among the components, but may also reflect actual differences between the chemical composition in flower tissue and what is released." \\ |
| [Plant Semiochemicals as Mosquito Attractants. Dissertation by Philip E. Otienoburu. The Ohio State University 2011, 59] [[https://etd.ohiolink.edu/!etd.send_file?accession=osu1313605670&disposition=attachment]] | [Plant Semiochemicals as Mosquito Attractants. Dissertation by Philip E. Otienoburu. The Ohio State University 2011, 59] [[https://etd.ohiolink.edu/acprod/odb_etd/ws/send_file/send?accession=osu1313605670&disposition=inline|PDF]] |
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| | Phenylacetaldehyde is the key floral semiochemical mediating attraction of moths to A. speciosa. \\ |
| | [Eby, Chelsea, et al. "Phenylacetaldehyde attracts male and female apple clearwing moths, S ynanthedon myopaeformis, to inflorescences of showy milkweed, A sclepias speciosa." Entomologia Experimentalis et Applicata 147.1 (2013): 82-92] |
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| {{:asclepias_speciosa.jpg}} \\ | {{:asclepias_speciosa.jpg}} \\ |
| Ascelpias speciosa flowers, Author: [[https://www.flickr.com/people/50169152@N06|Bureau of Land Management Oregon and Washington]] \\ | Ascelpias speciosa flowers © [[https://www.flickr.com/people/50169152@N06|Bureau of Land Management Oregon and Washington]] [[https://creativecommons.org/licenses/by-sa/2.0/deed.en|CC BY-SA 2.0]] |
| [[https://commons.wikimedia.org/wiki/File:Asclepias_speciosa.jpg|wikimedia commons]] | [[https://commons.wikimedia.org/wiki/File:Asclepias_speciosa.jpg|wikimedia]] |
| [[https://creativecommons.org/licenses/by-sa/2.0/deed.en|CC BY-SA 2.0]] | |
