[144] In the first, the entangled underground stems and roots resemble a bird's nest; in the second, the peculiar red rhizomes are rather like coral.
[145] Dr. Bull, Journal of Botany, vol. 2, p. 273.
[146] Kerner and Oliver, Natural History of Plants, vol. 1, p. 136.
[147] Groom, Ann. Bot., 1903, p. 223.
[148] Kerner, Natural History of Plants. Many details are taken from this work in the present chapter.
[149] Dennett.
[150] Green, Vegetable Physiology, p. 203.
[151] Annals Botany, vol. 3, p. 253, and vol. 6, p. 401.
[152] Macchiati, Botan. Centralblatt, 41, 190.
[153] Miall, Nature, Aug., 1898, p. 377.