Night time flowers?

[Frank van de Loo]

u6064315 at ucsvc.ucs.unimelb.edu.au wrote:
>I would be interested if anyone knows of a plant with flowers that
>open only at night.

I have a succulent house plant that was given to me as "night-blooming
sirrus", but so far it hasn't flowered for me, and I am also very unsure 
of the spelling, could be seerus, cerus, who knows.  Anyone else familiar 
with this plant?

Frank van de Loo.