It is Courouptia guianensis Aubl. of Lecythidaceae family.

Thank you very much, Sir. Arvind Singh.

Nice to meet you!

Dear Sir Arvind Singh,

Is it also called "Sala tree" - a symbol of Buddhism?

 Hi Nguyen,

I am also glad to meet you. Courouptia guianensis is commonly known as cannon ball tree. The tree is native to the rain forest of Central and South America. Here are some links to know about the details  of this interesting tree species. 

http://www.flowersofindia.net/catalog/slides/Cannon%20Ball%20Tree.html

http://ntbg.org/plants/plant_details.php?plantid=3487

https://en.wikipedia.org/wiki/Couroupita_guianensis

http://www.pharmacophorejournal.com/issue/Pharmacophore_January-February_2014_article13.htm

http://scribol.com/environment/plants/the-dangerous-and-dreadful-smells-of-the-cannonball-tree/

Best

Dr. Arvind Singh

Yes you are right. Please check the link given below.

http://thanhsiang.org/kl/articles/mp/mp-06sala.htm

Hi Nguyen,

The real Sala tree is botanically known as Shorea robusta of Dipterocarpaceae family. It is native to Indian subcontinent. Buddhism has originated in India. Please check the links given below for more details. The image of real Shala tree is attached herewith.

https://en.wikipedia.org/wiki/Shorea_robusta

http://www.buddhisma2z.com/content.php?id=351

http://www.ecoindia.com/flora/trees/sal-tree.html

http://www.buddhanet.net/e-learning/buddhism/lifebuddha/2_29lbud.htm

http://sdhammika.blogspot.in/2008/05/sal-tree.html

Good Luck

Lord Buddha passed away under the Sal tree (at Kushinagar) which is scientifically known as Shorea robusta of Dipterocarpaceae. family.  Please check the pdf attachment.

Thank you very very much, Sir. Arvind Singh.

I got it. I learned many valuable things from your sharing resources.

Best wishes for you.

Hiep from Vietnam.

Species Name: Couroupita guainensis

Family: Lecythidaceae.

DEAR NGUYEN

The image you posted is the photograph of Courouptia guianensis is commonly known as cannon ball tree. 

With regards

Sunit Mitra

Dear Sunit Mitra.

Thank you very much for your answer.

I got it!

Best regards,

Hiep.

Canonball Tree - Couroupita guianensis - Lecythidaceae,family

Dear Prof. Seshagirirao Kottapalli,

Thank you very much for your answer.

I got it!

Best regards,

Hiep from Vietnam.

Dear Nguyen,

See the link given below:

https://www.researchgate.net/profile/Subir_Bandyopadhyay3/contributions

where I have uploaded an image of a beautiful flower of Courouptia guianensis.

I hope you will like it.

Best wishes,

Subir.

Dear Prof.Subir Bandyopadhyay,

Thank you very much.

I have seen your picture.

SO beautiful.

I have another question: this tree's fruit can be eaten?

Thanks a lot/

Hiep

Hi Hiep,

The fruits of  Cannon ball tree (Couroupita guianensis) are used to feed livestock.  Fruits are edible but not usually eaten by people because it can have an unpleasant smell.  The under ripe fruits are poisonous any may cause allergy.  For more details please follow the links given below and also the pdf attachment.

http://theindianvegan.blogspot.in/2012/10/all-about-cannonball-fruit.html

http://herbs-treatandtaste.blogspot.in/2011/05/cannonball-tree-couroupita-guianensis.html

http://ntbg.org/plants/plant_details.php?plantid=3487

http://www.forestgeneration.com/cannon-ball-tree.html

Best

Dear Prof. Arvind Singh,

I got the information. Thank you very much for your sharing knowledge.

This is the first time in my life I have seen this tree.

Thanks a lot.

Hiep from Vietnam.