Orchids have epiphytic roots. Their roots have an inside core (cortex) that carries nourishment and an outside covering (velamen) that absorbs water, fertilizer and oxygen, and clings to the plant's support, according to the Canadian Orchid Congress.
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Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.