Acer insulare Makino ； Shima-uri-kaede
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1. Acer insulare of the Botanical Garden of Osaka Metropolitan University
I visited "Botanical Gardens of Osaka Metropolitan University" on May 5, 2006.
Accordeing to the pamphlet it takes 6 minutes on foot from Keihan-Kisaichi station.
Acer insulare is located at the red circle on the following garden map.
Besides Acer insulare, I enjoyed observing many maples such as
Acer pictum (mono), japonicum, sieboldianum, rufinerve,
nipponicum, pycnanthum, carpinifolium and amoenum
as well as many kinds of cultivated species.
At first, I will show you tree shape of Acer insulare.
Next, trunks.
Then, let me show you its branches with leaves and seed.
Appearance of vague 3 lobes and elliptic or oval leaves & seeds being made
Left ; Vague 3 lobes and elliptic or oval leaves, Right ; Five-lobed leaves with caudate point
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I visited again on October 15, 2006.
Appearance of vague 3 lobes and elliptic or oval leaves & ripened seeds
Appearance of ripened seeds
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The seeds I received germinated in the spring of 2007.
Some seeds that sprouted in spring showed red leaves in autumn.
Autumn leaves of current year seedlings
These seedlings were transplanted into pots.
Many 3-lobed and 5-lobed leaves are observed.
The plant enters its third spring.
We can see the transition from the initial 3-lobes to a 5-lobes leaf shape.
Five-lobed leaf shape
New leaves of 4th year seedlings ; Five-lobed leaf shape
Autumn colors from yellow to red in 2011 continued till Jan. 01, 2012.
The image of the leaf shape seen in the botanical garden, that is,
the obscure three-lobed, oval-oval shape is not seen in these leaves.
This seedling may be considered to be a hybrid or crossbred type.
5-lobed leaf shape in spring 2012
In the summer of 2012, the tips of the branches are vaguely 3-lobed and oval-shaped leaves,
and mature leaves look like five-lobed leaves.
Brilliant autumn leaves scenery in the backlight of autumn 2016
The oval and egg-shaped leaves of the parent tree of the Botanical Garden seem to be fading.
The autumn color of this seedling is more like red leaves than yellow leaves.
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2. Acer insulare which returned home
In December 2000, I received the seed along with the following e-mail from a friend in Europe.
"Seed of Acer insulare from the Japanese Island Amami-ohshima "
The seed germinated in the spring of 2001.
Germination of the seed in the spring of 2001.
In the spring of 2002, it became a sapling several dozen centimeters tall.
The appearance of the sapling in the spring of 2003
In the spring of 2006, two types were seen, one was greenish and another was brownish.
Many had greenish leaves with vague five lobes.
The next image shows a minority with brownish leaves and five lobes.
A minority that has brownish leaves with 5 lobes in spring
Greenish leaves with vague 5-lobes in spring 2008
They showed the leaves with characteristic colors in the spring of 2009.
Leaves with characteristic colors 1
Leaves with characteristic colors 2
It looked it has the charm of a garden variety.
Leaves with characteristic colors 3
Leaves with characteristic colors 4
The left shows the brownish type, and the right shows the greenish type.
In May 2009, it was transplanted to my Murakushi Maple Garden.
In June 2012, all maples were damaged by Typhoon No.4.
Greenish leaves with vague 5-lobes in April 2012
Greenish leaves with vague 5-lobes in June 2012
In April 2015, the green type was observed to have produced seeds for the first time.
In April 2015, the greenish type produced seeds.
The color of sprouting in March 2016
The scene where the seeds are starting to form in April 2016
The next is a zoomed central part.
The seeds are starting to form in April 2016
New leaves and flowers in 2017
In April 2017, it has already grown to about 8-9 m.
New leaves and flowers in 2018
Flowers on April 12, 2018
In October 2018, all maple trees were severely damaged by the salt damage of Typhoon No. 24.
Yellow leaves after salt damage in January 2019
The type of the brownish leaves with 5 lobes in Spring 2019
In spring 2019, flowers bloomed on greenish leaf type.
This type has vague 3-5 lobes, ovate leaves with pointed tips.
In May 2019, the leaves of the greenish type spread like a roof.
In the spring of 2020, leaves of greenish type are starting to appear.
The leaves of brownish type In the spring of 2020
In spring 2020, flowers of greenish leaf type.
The next is a zoomed left part.
Flowers of greenish type on March 25, 2020 , 1
Flowers of greenish type on March 25, 2020 , 2
On April 11, 2020, the green type shows the shape of seeds.
On April 02, 2020, the green type shows flowers.
The seeds produced in 2021 sprouted for the first time.
Flowers of greenish type on March 29, 2023
The next is zoomed flower part.
Zoomed flowers of greenish type on March 29, 2023
The trunk skin of the greenish type on April 17, 2023
Summer leaves of brownish type on June 1, 2023
This type has not shown flowers yet.
Seeds of the greenish type on June 1, 2023
The germination and growth of the seeds collected in 2021 are shown on the following page.
The germination and growth of the seeds
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