crosswort

from The Century Dictionary.

• noun A name of plants of various genera, particularly Galium cruciatum (see Galium), Eupatorium perfoliatum (more commonly called boneset), Lysimachia quadrifolia, and plants of the genus Crucianella.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A name given to several inconspicuous plants having leaves in whorls of four, as species of Crucianella, Valantia, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Crucianella stylosa, an ornamental plant.
• noun Cruciata laevipes, the smooth bedstraw.
• noun Lysimachia quadrifolia, a herbaceous plant of North America.