onion couch References onion couch plant Ask Anything Homework Help Also known as: Arrhenatherum elatius bulbosum Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: oat grassOnion couch, a variety of tall oat grass (A. elatius, variety bulbosum) named for its bulblike basal stems, is a noxious weed in areas outside its native range. Read MoreOnion couch, a variety of tall oat grass (A. elatius, variety bulbosum) named for its bulblike basal stems, is a noxious weed in areas outside its native range. Read More
