Cyperus longus is a species of sedge known by the common name galingale. It is a tall plant, growing up to a metre in height, with creeping rhizomes and erect, triangular stems, each terminating in an inflorescence. The species is native to southern England, south Wales, and western France. It grows in shallow water or on damp ground, such as at pond edges.
- "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-01-25. Retrieved 2014-10-17.
- Rose, Francis (1989). Colour identification guide to the grasses, sedges, rushes and ferns of the British Isles and north-western Europe. London: Viking. p. 166. ISBN 978-0-67080-688-1.
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