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''Dittrichia viscosa'', also known as False Yellowhead, Sticky Fleabane, Woody Fleabane and Yellow Fleabane, is a flowering plant in the daisy family. ''Dittrichia viscosa'' is a highly branching perennial common throughout the Mediterranean Basin. It has long, narrow leaves that are pointed at both ends and have teeth along the edges and glandular hairs on the surfaces. One plant can produce many yellow flower heads each with as many as 16 ray florets and 44 disc florets.〔(Malta Wild Plants, false yellowhead, ''Dittrichia viscosa'' ) includes photos, description, etymology, and other information〕 Originally, the species was found mainly in dry riverbeds and abandoned fields up to a 1500 m (5000 feet) elevation. Nowadays it is quite common in roadsides and ruderal habitats, even in urban areas. It is considered an invasive species in Australia.〔(Weeds Australia, False yellowhead (Dittrichia viscosa) weed management guide ) 〕 The False Yellowhead is a tough plant, very resistant to adverse conditions and degraded environments. It is important as food for the caterpillars of certain butterflies and moths, like ''Ioana iolas''. Despite the fresh-looking green color of its leaves and its attractive inflorescence,〔(Institució Catalana d'Història Natural, Flora del Bages - Olivarda ) in Catalan with photos 〕 this plant is sticky and has a certain smell that most people find unpleasant. It contains an essential oil〔( Ses Sitges, Sant Llorenç des Cardassar, Plantes aromàtiques ) in Italian, with photos and descriptions of several aromatic herbs〕 and has been used in traditional medicine since ancient times, especially in the Levant, as an astringent.〔(Avisco Ltd., Traditional medicine uses of ''Inula viscosa'' )〕 It is an important plant in Catalan tradition, often mentioned in adages and proverbs. One adage says that: ''"els raïms són madurs quan floreixen les olivardes."'', the grapes are ripe when the Yellow Fleabane blooms. ;Subspecies〔 *''Dittrichia viscosa'' subsp. ''angustifolia'' (Bég.) Greuter *''Dittrichia viscosa'' subsp. ''maritima'' (Brullo & De Marco) Greuter *''Dittrichia viscosa'' subsp. ''revoluta'' (Hoffmanns. & Link) P.Silva & Tutin *''Dittrichia viscosa'' subsp. ''viscosa'' ==Gallery== File:Inula viscosa01.jpg|''Dittrichia viscosa'' habitus File:Inula viscosa seed heads.jpg|Seed heads Image:Inula viscosa flowers.jpg|''Dittrichia viscosa''. Flowers File:Inula viscosa leaves.jpg|Leaves File:Utetheisa pulchella on Dittrichia viscosa 1.JPG|''Utetheisa pulchella'' on ''Dittrichia viscosa'' File:Ruderal community Dittrichia viscosa on gravel01.jpg|Ruderal community of ''Dittrichia viscosa'' growing on the railway-side gravel next to Petah Tikva-Sgula railway station, Israel. File:D. viscosa-cips-1.jpg|Cipselae ''in situ'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dittrichia viscosa」の詳細全文を読む スポンサード リンク
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