. The natural history of plants. Botany. 474 NATURAL HISTORY OF PLANTS. America. The leaves are opposite, petiolate, oral, dentate or nearly entire, glabrous, hairy, penninerved. The flowers (small, white, or Ciraea lutetiana. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Baillon, Henri Ernest, 1827-1895; Hartog, Marcus Manuel, 1851-. London, L. Reeve & Co.