[54] Ibid.
[55] Ibid. 233:47. 1912
[56] Ibid. 242:12. 1912.
[57] U. S. D. A. Bu. of Pl. Ind. Bul. 137:31. 1909.
[58] Ibid.
[59] Ibid. 137:46. 1909.
[60] Ibid. 66:191. 1905.
[61] Ibid. 162:50. 1909
[62] Ibid.
[63] U. S. D. A. Plant Immigrants 51:4. 1910.