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LITERATURE ITED

  • 1
    Ballion, G. and M. The non-symbiotic germination of Orchid seed in Belgium. Orchid Review, 32, pp. 305308. 1924.
  • 2
    Bernard, NOËL. Évolution dans la symbiose. Ann. Sc. Nat. 9, pp. 1296. 1909.
  • 3
    Bultel. Les Orchidées germées sans Champignons ont des plantes normales. Rev. hort. p. 125. 1926.
  • 4
    Burgeff, Hans. Die Wurzelpilze der Orchideen, ihre Kultur and ihr Leben in der Pflanze. Jena , 1909.
  • 5
    Clement, Edward. Germination of Odontoglossum and other seed without fungal aid. Orchid Review, 32, pp. 233238. 1924.
  • 6
    Clement, Edward. The non-symbiotic germination of Orchid seeds. Orchid Review, 32, pp. 359365. 1924.
  • 7
    Clement, Edward. The non-symbiotic and symbiotic germination of Orchid seeds. Orchid Review, 34, pp. 165168. 1926.
  • 8
    Constantin J. La vie asymbiotique des orchidées. Ann. Sc. Nat. 8, pp. ixiv. 1926.
  • 9
    Garner, W. W. and H. A. Allard. Effect of the relative length of day and night and other factors of the environment on growth and reproduction in plants. Journ. Agric. Res. 18, pp. 553606. 1920.
  • 10
    Garner, W. W. and H. A. Allard. Further studies in photoperiodism, the response of the plant to relative length of day and night. Journ. Agric. Res. 23, pp. 871920. 1923.
  • 11
    Hopkins, E. F. and F. B. Wann. The effect of the H-ion concentration on the availability of iron for Chlorella sp. Journ. Gen. Phy. 9, pt 2, pp. 205210. 1925.
  • 12
    Knudson, Lewis. Non-symbiotic germination of Orchid seeds. Bot. Gaz. 73, pp. 125. 1922.
  • 13
    Knudson, Lewis. Further observations on non-symbiotic germination of Orchid seeds. Bot. Gaz. 77, pp. 212219. 1924.
  • 14
    Knudson, Lewis. Physiological study of the symbiotic germination of Orchid seeds. Bot. Gaz. 79, pp. 345379. 1925.
  • 15
    Mercier. Les Orchidées du Brésil, La Forêt. Rev. scientif. 24, p. 244. 1926.
  • 16
    Wherry, Edgar T. Soil reaction in relation to horticulture. Amer. Hort. Soc. Bul. 4, pp. 114. 1926.