Differentiation of Utricularia ochroleuca and U. stygia populations in Trebon basin, Czech Republic, on the basis of quadrifid glands

Abstract

Utricularia ochroleuca R. Hartm. is an amphibious/aquatic carnivorous plant occurring relatively rarely throughout Europe and North America in peat bogs and shallow standing dystrophic waters. This species rarely flowers, is sterile, and is possibly of hybridogenic origin (i.e. U. minor × U. intermedia).