
1) Cole 2) Collard greens 3) Kail 4) Kale 5) Kale plants 6) Kale that has smooth leaves
Found on
https://www.crosswordclues.com/clue/collards

• (n. pl.) Young cabbage, used as `greens`; esp. a kind cultivated for that purpose; colewort.
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http://thinkexist.com/dictionary/meaning/collards/

(Brassica) This is a group of plants belonging to the Mustard family, Cruciferae. It includes vegetables that are commonly grown and known as Broccoli, Brussels Sprouts, Cabbage, Cauliflower, Collards, Kale, Kohlrabi, Mustard, Rape, Rutabaga and Turnip. Many can be grown for their ornamental leaves.…
Found on
http://www.encyclo.co.uk/local/10004
Col'lards noun plural [ Corrupted from
colewort .] Young cabbage, used as 'greens'; esp. a kind cultivated for that purpose; colewort. [ Colloq. Souther U. S.]
Found on
http://www.encyclo.co.uk/webster/C/108

[
n] - smooth-leaved kale
Found on
http://www.webdictionary.co.uk/definition.php?query=collards
collard greens noun kale that has smooth leaves
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.