Chenopodium oahuense - Image. Chenopodium oahuense - Image. Chenopodium oahuense - Image. Chenopodium oahuense - Image. Chenopodium olidum - Short description and medicinal uses. Chenopodium album - Description and uses of this species, commonly known as pigweed or lamb's quarters, with photographs. Chenopodium album - Several photographs of Fat Hen and its seedheads and information on it. Close-up View of Common Knotweed, Common Lamb’s-quarters and Sheep Sorrel - Photographic study by Brian Johnston of these three species, Polygonum arenastrum, Chenopodium album and Rumex acetosella. Chenopodium ambrosioides: Epazote - Description and illustrations of this annual herb, and information on its herbal properties, tribal and herbal medicine uses, the chemicals it contains, its biological activities and clinical research. Chenopodium ambrosioides: Epazote - Description, images, and use as a herb.