Identification: Help to ID this cool cacti?

Hello

Can anyone put a name to this cool looking plant for me please?
I bougt it because I like unique plants
It looks like a cactus and it has what look like little tiny leaves on it near the top parts.
It appears like it grows in branches. Would also like to know what light and such it requires. Thank you in advance for any assistance with this :-)

PS hope I am posting in the correct forum as it would not let me do so in the cacti and succulent forum

 

Euphorbia, maybe?
(If so, it is not a cactus.)
Does your plant have milky sap?

 

Does not look like a cactus, more like an Euphorbia.

 

Might be Euphorbia alluaudii (syn. Euphorbia leucodendron). The plant seems to go by other names, including E. leucadendron which appears to be a misspelling. Also, E. alluaudii has a couple of sub-species: alluaudii and oncoclada. More research required for proper name.

 

Looks very like a "pencil cactus" Euphorbia. Outdoors, they will get maybe 10' tall.