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Api-api
putih
Avicennia alba
Family Acanthaceae
updated
Oct 2016
Where seen? This tree with pencil roots is commonly encountered
in many of our mangroves. It can sometimes even be spotted from afar
by the white undersides of their narrow leaves, flipping up in the
wind. It is usually found on newly formed mudbanks on the seaward
side or along and near rivers. It is considered a pioneering species
of sheltered shores.
Features: Shrub or tree up to
10-20m tall. Bark somewhat brown, may be smooth or slightly rough
but not fissured. Pneumatophores pencil-like - thin cylindrical with
rounded tip, not very tall (about 20cm). May have stilt roots emerging
from the base of the tree trunk.
Leaves generally long and pointed (8-12cm long), shiny dark green
above with white underside. 'Alba' and 'putih' means 'white'
in Latin and Malay respectively. A. alba can have different,
'non-standard' leaf and fruit shapes if the tree is growing in the
shade or affected by low nutrients or other difficult conditions.
Flowers small (about 0.5cm), yellow in clusters that are less crowded
together.
Fruit generally tear-drop shaped (1-4cm) with long tapering pointed
tip, smooth velvety.
Seedlings form as soon as the fruit drops off the parent plant. In
A. alba, the seedlings have hooked hairs so that the seedlings
are often seen in entangled clumps.
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Pasir Ris,
May 09
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Leaves very white underneath.
Berlayar Creek, Jan 09
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Small flowers, spaced apart.
Sungei Buloh Wetland Reserve, May 02
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Fruits
with long pointed tips.
Berlayar Creek, Mar 09
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Pulau Ubin,
May 09
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Sungei Buloh Wetland Reserve, May 02
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Sungei Buloh, Nov 01
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Young pneumatophore.
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Pasir
Ris, May 09
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Fallen
over tree which recovered.
Kranji Nature Trail, Feb 11
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May
have stilt roots as well as
pencil-like pneumatophores.
Kranji Canal, Mar 09
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Api-api
putih on Singapore shores |
Links
References
- Hsuan Keng,
S.C. Chin and H. T. W. Tan. 1990, The
Concise Flora of Singapore: Gymnosperms and Dicotyledons.
Singapore University Press. 222 pp.
- Tomlinson,
P. B., 1986. The
Botany of Mangroves
Cambridge University Press. USA. 419 pp.
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