What kind of cactus is this? yellow flower on top?

its a round little cactus that has little points around it, and in each little point it has 3 little needle looking sticks (i dont know how they are called) and a yellow flower on top.





does the little flower close at night?


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what's the name of this cactus?





thanks!

What kind of cactus is this? yellow flower on top?
Yes it does and the name is astrophytum myriostigma.
Reply:Without a photo, I can only guess; maybe a barrel cactus?
Reply:Hi, the cactus you desribe,sounds like it's a ,"Coryphantha Corniferia". The flower opens during the day, and close at night(I almost said,go to bed at night!) Bye
Reply:sounds like a yellow prickly cactus


google it, no doubt you will see it in picture form