A reassessment of the distribution of Carex recta Boott (Cyperaceae) in the British Isles

Carex recta Boott (Cyperaceae), Estuarine Sedge, is a rare sedge in the British Isles and is currently known from only three sites in Scotland. At another Scottish locality a presumed hybrid C. acuta × recta has been identified. The morphological distinction between C. recta and C. acuta was investigated using qualitative and quantitative characters. Using the characters that discriminate between these two species, the presumed hybrid has been reassessed and is identified as C. recta.