The "Cooksche Form" ("Cook's form") is a variant of Cryptocoryne spiralis var. spiralis that is very suitable as aquarium plant. It was introduced from India in the 1990's. As submerged plant, this Cryptocoryne gets a moderate size, with about 25 cm long and 2 cm wide leaves. These are light to medium green, strap-shaped to very narrowly lanceolate and have a slightly wavy margin.