Luffa is a 5 letter English word. It's valid Scrabble word worth 11 points. It's valid Words with friends word worth 13 points.
You can make 29 anagrams from letters in Luffa (afflu).
Another species (luffa drastica, of Martius) is also employed for the same purpose.
No luffa has been long cultivated in China, according to a letter of Dr. Bretschneider.