Eight species of pigweed are common to Tennes- see, making it very difficult to distinguish between species in the seedling growth stages. Following are.
prostrate pigweed common waterhemp tall waterhemp. Palmer amaranth. A generalized distribution map; photographs of seed, seedling, and mature plants;
Redroot pigweed (Amaranthus retroflexus) seedling leaves (cotyledons) are narrow and long, and they lack a distinct midvein bisecting each leaf.
The seed is very small but easy to harvest and very nutritious. The flavour is greatly improved by roasting the seed before grinding it. Pigweed seed can be .