KEY TO THE SPECIES

1Plant flowering during the night, flowers pale yellow. Fruit 10-ribbed. Leaves rather pale green, angular or lobed up to 1/3 deep
Luffa acutangula
1'Plant flowering during daytime, flowers bright yellow. Fruit not ribbed. Leaves dark green, variable of shape, lobed up to 4/5 deep
Luffa aegyptiaca