Fagopyrum esculentum (Buckwheat)
Reference concerning Buckwheat allergy:
Görthe, CJ, Wieslander, G, Ancker, K, and Forsbeck, M. 1983. Buckwheat allergy: Healthfood, aninhalation health risk. Allergy 38:155-159
Reference concerning general crop allergies and occupational toxicology:
Exposure to Allergens and Microorganisms in Cultivating and Handling of Crops - A Review on Health Hazards and Some Aspects on Exposure Assessment..
Thanks to Thomas Björkman (Assoc. Professor of Vegetable Crop Physiology, Dept. of Horticultural Sciences, Cornell Univ., Geneva, NY 14456) for providing the above two references.
More information describing this plant can be found under Fagopyrum esculentum, Buckwheat, in the Canadian Poisonous Plants Information System, courtesy of Derek B. Munro.