Cruciate (cruciform): Cross-shaped, used especially of the flowers of the Brassicaceae family.*
The 4-petalled flowers of Brassicaceae (mustard family) plants, such as this dame’s rocket (Hesperis matronalis) are characteristically arranged in a cross shape.
*Jackson, B. Daydon. (1928). A glossary of botanic terms (4th ed.). New York: Hafner Publishing Co.
