Luffa

Also called 'loofa', 'loofah' this is a vine growing in tropics and subtropics. Its fruit is around one foot long with smooth dark green skin and soft core with black seeds. Except for its smooth skin it is identical to the angular gourd. Being very fibrous, fully ripen fruits when dried, yields fibre, tradinally used as dish wash scrub hence, came to be known as 'Egyptian bath sponge', 'Egyptian dishcloth','Towel Gourd'