Eric Walker added Isatis tinctoria - Wikipedia and Collections: Clothing, How Did They Make It? Part IVa: Dyed in the Wool – A Collection of Unmitigated Pedantry to Woad, and added Woad to Isatis

Eric Walker added Woad to Isatis, and added Isatis to Brassicaceae

Eric Walker added Isatis and Brassica to Brassicaceae, and added Brassicaceae to Brassicales