twisted whitlow grass References twisted whitlow grass plant Ask Anything Homework Help Also known as: Draba incana, hoary whitlow grass Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: whitlow grassTwisted, or hoary, whitlow grass (D. incana) and the smaller D. norvegica have leaves on the stems and white flowers with notched petals. Read MoreTwisted, or hoary, whitlow grass (D. incana) and the smaller D. norvegica have leaves on the stems and white flowers with notched petals. Read More