colewort

“Collards is a corruption of colewort — colewort is any non-heading cabbage,” said Dr. Harris, the author of “High on the Hog: A Culinary Journey From Africa to America.”

From New York Times ● Dec. 24, 2021

Then upon thyme and tansy think, On fields of sainfoin, ruddy pink, On dells deep down and rocks upreared, On lad's-love and on old-man's-beard, On spearmint and on silver sages, On colewort and on saxifrages!

From Punch, or the London Charivari, Vol. 146, February 4, 1914 by Sir Owen Seaman

In these beds, along with the tobacco, they generally sow kale, colewort, and cabbage seed, &c., at the same time.

From The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. by P. L. Simmonds

The aid of a Highland leech was procured, who probed the wound with a probe made out of a castock; i.e., the stalk of a colewort or cabbage.

From Rob Roy — Volume 01 by Sir Walter Scott

Runts, the trunks of trees, the stem of colewort.

From The Modern Scottish Minstrel, Volume II. The Songs of Scotland of the past half century by Charles Rogers