Amorphophallus sumatra

Life cycle of amorphophallus titanum

Amorphophallus titanum, also known as the titan arum, is a flowering plant with the largest unbranched inflorescence in the world. The titan arum's inflorescence is not as large as that of the talipot palm, Corypha umbraculifera, but the inflorescence of the talipot palm is branched rather than unbranched.
Due to its odor, which is like the smell of a rotting co**se or carcass, the titan arum is characterized as a carrion flower, and is also known as the co**se flower or co**se plant (Indonesian: bunga bangkai – bunga means flower, while bangkai can be translated as co**se, cadaver, or carrion). For the same reason, the title co**se flower is also attributed to the genus Rafflesia.
explanation, from wikipedia