Vallisneria asiatica var. biwaensis
This spiral-leafed form of Vallisneria was originally brought into the hobby from lake Biwa in Japan. It is a hardy, easy plant, and soon became an aquarium staple.
Common Name: Corkscrew Val
Family Name: Hydrocharitaceae
Native To: Haiti, Venezuela, Japan
Lighting: Moderate
Requirements: Undemanding, but does better with some hardness in the water
Growth Form: Rosettes on short runners
Growth Rate: Fast
True Aquatic: Yes, obligate aquatic
Placement in Tank: Background
Available As: Bare root, bunch