The Brassica section of the database is pretty messy, Rick. Brassica pekinensis, Brassica rapa var. pekinensis, and Brassica rapa subsp. pekinensis are all synonyms of Brassica rapa, and there's no such thing as Brassica rapa pekinensis. The whole section's full of invalid names and synonyms masquerading as accepted names. I started to work on it and then decided to make dinner instead.
Here's a list of the synonyms of Brassica rapa. It's staggering and it made me hungry.
http://www.theplantlist.org/tp...
