|Abstract||The Arnold Arboretum of Harvard University, Jamaica Plain, Mass. The Gray Herbarium of Harvard University, Cambridge, Mass. U.S. National Herbarium, Smithonian Institution, Washington, DC. New York Botanical Gardens, Bronx Park, Fordham Br.P.O., N.Y. Bot. Gardens, Ann. Arbor, Mich. University of California, Department of Botany, Berkeley, Cal. Field museum of natural History, Department of Botany, Chicago, Ill.|
Great Britain. Royal Botanic Gardens, Kew-Surrey (except types) British Museum, Natural History, Bot. Department, Cromwell Road, London SW & Botany School, Cambridge.