This member of the Araceae family was given this name by Heinrich Gustav Adolf Engler in 1883. It is found in Argentina, Bolivia, Paraguay and Peru, growing in a rich but drained soil with quite some water and some sun. The caudex can grow to ten centimetres in diameter, the entire plant to 50 centimetres in height, 70 centimetres with the inflorescence. The flowers are purplish-brown, and have an unpleasant smell.
The species name from the Greek syn; 'together' and aden; gland, referring to the united glands of the inflorescence and spadix; 'a flower spike with a fleshy axis. The species name means 'worm' and 'poisonous'. The flower by RuuddeBlock, Garden.org