An Amazon Sword Plant is a common and popular freshwater aquarium plant sold in pet stores today. Hobbyists may find that different stores sell different varieties of plants under the name “Amazon Sword Plant.” One variety, Echinodorus bleheri has broad leaves. Another variety, Echinodorus amazonicus has narrower leaves. But either way, varieties of this plant can be a great addition to a freshwater aquarium. Just be aware that “Amazon Sword Plant” may refer to similar plants that look slightly different.