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資料編號: | HK-3322 |
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中文名稱: | 桉屬(SPP) |
學名: | Eucalyptus spp. [找同屬植物] |
植物科名: (APG新系統) | MYRTACEAE桃金娘科 [找同科植物] |
標室舊系統 | MYRTACEAE桃金娘科[找同科] |
資料更新: | 20220807 08:47:04 am |
備註: plantnet.rbgsyd.nsw.gov.au: Description: Trees, mallees or shrubs, often forming an underground lignotuber in many species; bark persistent (`rough barks'), or partly or wholly regularly shedding (`smooth barks'). Leaves dimorphic; juvenile leaves opposite; adult leaves usually disjunct opposite (appearing alternate); similifacial or less commonly dorsiventral, oil glands usually present in leaves. Inflorescences usually based on condensed dichasia, forming umbellasters, mostly solitary and axillary but sometimes aggregated into compound terminal, pseudo-terminal or axillary structures; individual umbellasters usually 7-flowered, but ranging from 1 to >30 flowers in some species. Calyx and/or corolla fused into a calyptra which persists to anthesis. Stamens numerous, usually in several continuous whorls; anthers versatile or adnate, dehiscing by separate or confluent slits or pores. Ovary half-inferior, 2–7-locular, enclosed by hypanthium except at top; ovules numerous, ovulodes present. Fruit a capsule, becoming woody in most species. 香港觀賞樹木彙編3-checklist: (a)花序複合,丁字著藥,果實的花盤凹陷--傘房桉屬 Corymbia (b)不具以上特徵組合--桉屬 Eucalyptus 桉屬 Eucalyptus: 1a:一般僅見對生葉的幼葉,不見成熟葉-銀葉桉 1b:成長後樹冠可見互生的成熟葉 -2a:樹皮顏色多變-彩虹桉 -2b:樹皮不具此特徵 --3a:枝條樹皮宿存 ---4a:成熟葉呈狹披針形-窿緣桉 ---4b:成熟葉呈卵形至闊披針形 ----5a:樹皮灰褐色-大葉桉 ----5b:樹皮橙褐色-尾葉桉 --3b:枝條樹皮剝落 ----6a:樹幹宿存的樹皮呈橙褐色, 成熟葉呈闊披針形尾葉桉 ----6b:樹幹宿存的樹皮呈灰色至灰褐色, 成熟葉呈狹披針形 -----7a:花蕾和果實緊密排列, 帽狀體呈圓錐狀-細葉桉 -----7b:花蕾和果實排列一般較疏離, 帽狀體先端常呈啄狀-赤桉 窿緣桉,大葉桉: 老樹皮整個樹幹宿存 檸檬桉[Corymbia citriodora]: 樹皮完全剝落至樹幹 娃娃手記 hkchecklist: 4b.樹皮薄,光滑,片狀剝落,有時樹幹基部宿存 --5a.花蕾帽狀體基部半球形,中部以上突然收縮,先端急尖且具喙--赤桉 --5b.花蕾帽狀體錐形,長7-10mm,先端漸尖--細葉桉 樹皮呈不規則脫落或長片狀脫落,一般看到時已光滑,灰白色而夾雜有棕褐色的斑塊。 細葉桉跟赤桉,毛葉桉,尾葉桉差不多,樹幹基部近地的位置常宿存粗糙樹皮。 香港都有老樹皮整個樹幹宿存的桉屬喬木,好像窿緣桉,跟大葉桉。 thanks Crawford's info From http://www.hktree.com 由1871年至今, 香港已引入廿多種桉屬Eucalyptus spp.樹木: 1871-1900 E. alba Bl. E. citriodora Hk.檸檬桉 E. gummifera Hochr. E. globulus Labill. E. haemastoma Sm. E. moluccana Roxb. E. marginata Sm. E. maculata Hk. E. microcorys F. Muell. E. pilularis Sm. E. resinifera Sm. E. robusta Sm.大葉桉 E. siderophloia Benth. E. bridegesiana R. Baker E. tereticornis Sm. 細葉桉 1945-1900 E. crebra F. Muell. E. grandis Maiden E. saligna Sm.柳葉桉 E. torelliana F. Muell. 毛葉桉 其他 E. calophylla 美葉桉 E. camaldulensis Dehnh. 赤桉 E. exserta F. Muell. 窿緣桉 E. urophylla 尾葉桉 | |
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2-3322b | |
1-3322a | |