Like this?
\documentclass{article}
\usepackage{graphicx}
\begin{document}
\makebox[0pt][c]{\rotatebox[origin=c]{0}{flower}}%
\makebox[0pt][c]{\rotatebox[origin=c]{22.5}{flower}}%
\makebox[0pt][c]{\rotatebox[origin=c]{45}{flower}}%
\makebox[0pt][c]{\rotatebox[origin=c]{67.5}{flower}}%
\makebox[0pt][c]{\rotatebox[origin=c]{90}{flower}}
\end{document}

Here there are two things. \makebox[<alignment>] will take <alignment> as l or c or r as values. And \rotatebox, according to the manual of graphicx:

Hence you can play with all of these options.
\documentclass{article}
\usepackage{graphicx}
\begin{document}
\makebox[0pt][l]{\rotatebox{0}{flower}}%
\makebox[0pt][l]{\rotatebox{22.5}{flower}}%
\makebox[0pt][l]{\rotatebox{45}{flower}}%
\makebox[0pt][l]{\rotatebox{67.5}{flower}}%
\makebox[0pt][l]{\rotatebox{90}{flower}}
\end{document}
