鐵刀木 kassod tree (senna siamea)

寫此文前先查看以前有否寫過鐵刀木。

有。去年10月。證明鐵刀木的花真的美,每次遇著便拜倒。

seeing kassod blossoming lately, decided to write about it. i have the habit of checking whether i’ve written the subject before. ha! last year around the same time, i was impressed by the beautiful bloom and made a post about the tree.

鐵刀木在香港是蠻常見的植樹。較大型公園一定有她的蹤跡。因為她容易生長,高大,常綠樹葉優美茂密。鐵刀木原產南亞,拉丁學名senna siamea蘊藏暹羅地名可知;中國亞洲其他地區也可找到。

kassod is quite commonly planted in this city. because it grows fast and tall and it is evergreen and has a pretty and dense crown. it is native to south asia including siam (check out the latin name) but is also found in china and other parts of asia.

網上資料找到樹的別名,沖著樹木特質和民間故事得來:挨刀樹、鐵路木、黑心樹(雲南)。

it is easy to recognize from the alternate, pinnate compound leaves as it is from the faaceae family and senna genus. it is also well-known of the hardness of its wood. one of the common usage is as railway crossties.

說完資料,目光回到樹的花和果。此時正值花季,果也是時候。早兩星期,往跑馬地香港墳場走了一轉。愛那裡完全幽靜古木處處,思古賞綠聽鳥,可以洗滌心靈。

what trigger me to write about the tree this time, is my two latest encounters.

the 1.5 century old kassod at hong kong cemetery was in full bloom when i visited it two weeks ago. i didn’t realize in the beginning, because the beautiful tree is so tall. when i walked pass under it, i was only busy appreciating its beautiful pattern of the bark on the thick round tree trunk and smelling in the green and spirit of the awesome tree towering over me. i stepped further away. the yellow caught my eyes. the tree is blossoming all over. the flowers in radiating clusters look like dancing on the tree.

kassod happy valley

園內有個乾枯的噴水泉,往園內方向走幾步就是年過世紀鐵刀木。樹下走過,一定摸撫老而彌堅的樹幹,再仰望高聳的樹冠。當天,走遠些,驚喜。整樹開花,黃色的圓錐花序,有點像小花火燃亮,火光騰躍。

前天,到植物公園遊走一陣。赫然路上躺著一把花果。花冠圓苞狀,溫婉翹美。牽著三枚莢果,一枚呈紫褐色成熟了。

few days back, i have had a close up with its flowers and fruit. a branch fell from a tree nearby gave me a chance to have a good view: five petals form the bowl-shape bloom, pretty in yellow. the pods are also nicely coloured and shaped. kassod fruit turn purple when mature.

kassod flower and pod

鐵刀木 kassod tree (senna siamea) – 植物界 plantae kingdom | 被子植物門 magnoliophyta division | 雙子葉植物綱 magnoliopsida class | unrank 未分級: 類真薔薇分支 eurosids i | 豆目 fabales order | 豆科 fabaceae family | 蘇木亞科 cæsalpinioideae subclass | 決明族 cassieae tribe | 決明亞族 cassiinae subtribe | 決明屬 senna genus | 鐵刀木 s. siamea species

參考 ref:

鐵刀木又名黑心樹,相傳雲南某地一位土司因生前作惡多端,死後為懺悔一生所作,而變成樹木讓村民砍伐作薪柴之用。西雙版納傣族的族民大量栽種本種作薪材之用,族民每次砍伐本種的枝幹後,本種很快長出眾多的枝條,3年之後可再次砍伐,因此又名挨刀樹。本種因常用於鐵道枕木,因而有鐵路木之稱。《維基》

前文 earlier post: 鐵刀木花季 flowering season of kassod tree

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