Acorus Calamus Var

Some articles on acorus, acorus calamus:

Acorus Calamus - Botanical Information
... The morphological distinction between the Acorus species is made by the number of prominent leaf veins ... Acorus calamus has a single prominent midvein and then on both sides slightly raised secondary veins (with a diameter less than half the midvein) and many ... This makes it clearly distinct from Acorus americanus ...