Bibliography.

Allan, H. H., 1937. The Origin and Distribution of the Naturalized Plants of New Zealand. Proceedings of the Linnean Society, London, Session 150, Part I, p. 30.

—— 1945. Annual Report, Department of Scientific and Industrial Research, Wellington, New Zealand, pp. 26–27.

Bailey, L. H., 1928. The Standard Cyclopedia of Horticulture. Edition 2, revised. New York.

Beck-Managetta, G., 1930. Orobanchaceae. Das Pflanzenreich, 96; iv.

Bentham, G., 1873. Flora Australiensis. Vol. 6, pp. 192–202. London.

Black, J. M., 1922–29. Flora of South Australia. Adelaide, South Australia.

Brand, A., Polemoniaceae. Das Pflanzenreich, 27: iv, pp. 24–25.

Britton, N. L., and Brown, A., 1913. An Illustrated Flora of the Northern United States, Canada, etc. Edition 2, vol. 3, p. 3. New York.

Cheeseman, T. F., 1883. The Naturalized Plants of the Auckland Provincial District. Trans. N.Z. Inst., vol. 15, p. 281.

—— 1925. Manual of the New Zealand Flora. Edition 2. Wellington.

Cunningham, A., 1837–40. Florae Insularum Novae Zelandiae Proecursor…Magazine of Zoology and Botany, vol. 1–4.

Healy, A. J., 1944. Some Additions to the Naturalized Flora of New Zealand. Trans. Roy. Soc. N.Z., vol. 74, p. 229.

Hegi, G., 1908–31. Illustrierte Flora von Mittel-Europa. Munchen.

Hitchcock, A. S., 1935. Manual of the Grasses of the United States. Washington, D.C.

Hooker, J. D., 1852–55. Flora Novae-Zelandiae. London.

—— 1864–67. Handbook of the New Zealand Flora. London.

Kirk, T. W., 1889. Annual Report, New Zealand Department of Agriculture, p. 225.

Laing, R. M., 1919. The Vegetation of Banks Peninsula, with a list of Species. Trans. N.Z. Inst., vol. 51, pp. 355–408.

Oliver, W. R. B., 1944. The Veronica-like Species of New Zealand. Records of the Dominion Museum, vol. 1, p. 230.

Rehder, A., 1927. Manual of Cultivated Trees and Shrubs. New York.

Sherff, E. E., 1937. The Genus Bidens. Part I. Field Museum of Natural History, Botanical Series, vol. 16, pp. 33–71, 246–50, 268–89.

Smith, W. W., 1904. Plants Naturalized in the County of Ashburton. Trans. N.Z. Inst., vol. 36, p. 208, 219.

Thomson, G. M., 1922. The Naturalization of Animals and Plants in New Zealand. Cambridge.