銀樺 silky oak

銀樺很好認:樹形高挑,樹冠修長;葉羽狀深裂,裂片再分裂,每片就是一羽優美的鉤弧,而葉背銀灰色。

silky oak is easy to recognize with its tall and slander posture and its leaves are hard to miss. the pinnate leaves are split into lobes and sub-lobes. each leaf is a feather of graceful arc hooks and arcs, and the back of the leaves are silvery grey in colour.

 

那知外形孤清的他,花朵卻是熱暖的柔情,一梭梭橫放的黃紅花荽。

互動百科》描述:總狀花序,單生或數個聚生於無葉的短枝上,長7-16公分。花兩性,無花瓣,萼片四,花瓣狀,橙黃色。花被長約1㎝,花柄長8-12㎜,極擴展或稍下彎,禿淨;子房禿淨,具柄。

據《台東洪記植物檔案》,其繁殖的伎俩更是引入入勝 -銀樺的花朵為提高自花授粉的成功率,有著非常特殊的結構。其花被呈筒形,四裂,雄蕊著生於花被筒上部,無花絲,子房具短柄,黃色花柱長約 0.8 公分,無花瓣,花萼部份合生於一側。花朵未開放前,柱頭和花柱的先端彎曲包覆於花被片裡,形成圓圈狀,花藥則長在花被片的內側。花朵開始綻放時,彎曲的雌蕊會自花被片伸直抽出,塗抹雄蕊,以完成自花授粉的任務。

銀樺原生于澳洲。

its flowers are golden-orange bottlebrush-like blooms in the spring, on a 2–3 cm long stem and are used for honey production; the seeds mature in late winter to early spring, fruiting on dark brown leathery dehiscent follicles, about 2 cm long, with one or two flat, winged seeds,says wikipedia.

interesting to learn from Wikipedia about this australian native: before the advent of aluminium, the timber from this tree was widely used for external window joinery as it is resistant to rotting. it was also popular for making furniture and was one of australia’s best known cabinet timbers.

銀樺 silky oak (grevillea robusta) – kingdom: plantae | order:proteales 山龍眼目| family: proteaceae山龍眼科 |genus:grevillea 銀樺屬 | species:g. robusta 銀樺種

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