Vervain n. : Any plant of the genus Verbena.

Example:
Can I substitute butter for Vervain in a love spell?

Taxonomy
Vervain, Designer Options.

Defination from the web:
USA. Design and distribution of woven, yarn and solid dyed, and printed fabrics for upholstery and furnishing, from natural and man-made fibers and blends. Detailed product catalog, searchable by construction and color. Technical specifications.