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Scanning electron micrographs of longitudinal cuts through the haustoria of the parasitic angiosperm Rhinanthus attacking the roots of C. cristatus (A), P. bertolonii (B and C), V. cracca (D and E), L. vulgare (F) and P. lanceolata (G). The numbers indicate: 1, parasite haustorium; 2, host root; 3, osculum; 4, lateral root; 5, lesions in host root. Scale bars are shown with each image. The parasite haustorium in (D) is behind the host root.
