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

As the Thebans swore by Osiris, the Ionians by the cabbage and the colewort, so also in Athens Minerva formed the staple of the national oaths.

From A Cursory History of Swearing by Sharman, Julian

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 Simmonds, P. L.

These words are evidently of the same class, though not of the same species with bishopric, colewort, spillikin, gossip, mainswearer, &c.

From A Handbook of the English Language by Latham, R. G. (Robert Gordon)

The huile de colza, extracted from the colewort, is still very largely used, and is an excellent oil for lamps; and acetylene is beginning to take the place of coal-gas as an illuminator.

From Paris From the Earliest Period to the Present Day; Volume 2 by Walton, William