紫春花 - 港油麻藤 a violet spring flower – hong kong mucuna (mucuna championii)

三月中一個週日,在鹿頸附近遊走,偶遇港油麻藤,非常美的紫春花。

港油麻藤與俗稱禾雀花的白花油麻藤是近親,同屬黧豆屬,而前者因首次在香港發現,所以以港命名,又稱香港黧豆。

此攀藤植物花冠蝶形,紫色花朵成總狀花序。卵形三小葉形成羽狀複葉序。果披銹色硬毛,腹背有翅。比起白花禾雀花,紫色的似乎較少見。這次難得機會在野外碰到,對鮮花驚艷,旁邊已枯老的烏紫色調和變化了的質感,也像老了的酒,饒有味道。

it was a great surprise spotting this beautiful native species during a hike around luk keng in mid march. the dark violet is so gracious.

people are more familiar with mucuna birdwoodiana in the same family and species that bore yellowish white boom around this time as well. hongkongers and chinese refer them to java sparrow flowers. hong kong mucuna is relatively rare. this tall woody climber is first discovered in hong kong and is a native.

plant description quoting from herbarium.gov.hk : 

leaves pinnately 3-foliolate; terminal leaflets broadly ovate … racemes 8 – 20 cm. flowers often 3 on each node. calyx broadly campanulate, brownish hairy on both surfaces; tube 7 – 9 mm, the lowest tooth longest, 4 – 8 mm. corolla purple; vexillum suborbicular or ovate-orbicular, 2.5 cm; wings 4–4.3 cm; keel as long as wings or slightly longer.

港油麻藤/香港黧豆 hong kong mucuna (mucuna championii) – 植物界 plantae kingdom | 被子植物門 angiospermae division | 雙子葉植物綱 dicotyledoneae class | 蔷薇目 rosales order | 豆科 fabaceae family | 黧豆屬 mucuna genus | 種:港油麻藤 m. championii species (mixed sources)

 

參考 reference:《中國植物誌》; 香港植物標本室 hong kong herbarium

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