witchgrass Directory References Images Contents Ask the Chatbot a Question witchgrass plant Ask the Chatbot a Question Also known as: Panicum capillare Learn about this topic in these articles:description In panicumWitchgrass (P. capillare), a tufted annual, is a common weed in fields and disturbed areas. Its large purplish flower clusters break off and are blown by the wind.Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.