I went to Petcetera and got two Sagittaria subulata (I hope), they look a lot like the Vallisneria spiralis, which I already have and are producing runners. On the plant that I bought, there are bands parallel to the edges of the leaves. On the Vallisneria, I see the same thing, but not as distinct. Would someone be able to tell me the difference between sagittarias and vallisnerias?
