蠟燭果 river mangrove

蠟燭果又稱桐花樹。本地原生的常綠灌木。

上個月到濕地公園,遇到花蕾放射形展露,印象深刻。

aegiceras corniculatum is known as river mangrove in australia. this is one of the native mangroves in hong kong. it is an evergreen shrub.

last month when i visited the wetland park, the plant started budding. the radiating bud shape made a mark in my mind.

river mangrove buds

前天再訪,花開始開了。傘形花序,雪白小花,在紅樹林環境,提供花香和花蜜。

植物的果期在冬季,有待考察。果圓柱形,大概就是蠟燭果名字由來。

the day before i went to the park again and the plant is flowering.

the umbellate clusters of white flowers are pretty, and i just learnt from online information that they are good source of pollen for beekeepers.

river mangrove flowers

資料說它的胎生苗藏在果皮內(隱性胎生苗),要跌下,果皮裂開才可以生長。

追究下去,原來紅樹植物其中特色,就是胎生現象,以適應在鹽度高、土質鬆軟、缺氧及水中含氯量高的環境:果實還在母樹上時,胚自種子長出,伸出果實,形成具胚莖和根的胎生苗。幼苗垂掛在枝條上,自母株吸取養份。胚莖上有多數皮孔,可進行氣體交換。當幼苗脫離母株,成功插入泥中的,會長出側根,隨而長成幼樹。沒有順利植入泥土的,由於胎生苗細胞間隙大,可漂浮,直至定着適當生長環境。

生物自有奥妙的生存之道!

one interesting point about mangroves is that they are viviparous. they produce seeds that germinate on the plant. this is a mechanism mangroves develop because of the particular, or harsh, habitat.

nature magic!

蠟燭果 river mangrove (aegiceras corniculatum) – kingdom: plantae 植物界 | (unranked): angiosperms | (unranked): eudicots | (unranked): asterids | order: ericales | family: myrsinaceae (or primulaceae) 紫金牛科| genus: aegiceras蠟燭果屬| species: a. corniculatum種:蠟燭果 wiki

參考 reference:

  •  《樹木谷
  •  《葉脈網
  •  department of agriculture, fisheries and forestry, queensland government
  • mangroves are viviparous – once germinated, the seedling grows either within the fruit, or out through the fruitto form a propagule (a ready-to-go seedling) which can produce its own food via photosynthesis. the mature propagule then drops into the water, which can transport it great distances. propagules can remain dormant for over a year. once a propagule is ready to root, its density changes so the elongated shape now floats vertically rather than horizontally. in this position, it is more likely to lodge in the mud and root. if it does not root, it can alter its density and drift again in search of more favorable conditions. wiki
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