Should CBLAS Triangular Matrices be Full?

Hi I have a C program which does process on a large symmetric matrix with CBLAS and I need to allocate least possible memory in it. So I wanna pass triangular matrix which needs n(n+1)/2 memory, rather than full matrix with n*n.

As far as I concened, CBLAS routines such as cblas_dtrsv takes full matrix as input argument, which just process wither lower or upper triangular part.

Is it possible to use REAL triangular matrix in CBLAS? Thanks in advance -- Arya