[1899] Unger, Pflanzen des Alten Ægyptens, p. 34.

[1900] Bretschneider, Study and Value of Chinese Botanical Works, pp. 7, 8, 45.

[1901] Roxburgh, Fl. Ind., edit. 1832, p. 310; Piddington, Index.

[1902] Rosenmüller, Bibl. Alterth.; Dict. Franç.-Berbère.

[1903] Delile, Fl. Ægypt., p. 3; Forskal, Fl. Arab., civ.

[1904] Ad. Pictet, Origines Indo-Européennes, edit. 2, vol. i. p. 351.

[1905] Ibid.

[1906] Linnæus, Spec. Plant., i. p. 86.

[1907] Roxburgh, Fl. Ind., edit. 1832, p. 310; Aitchison, Cat. of Punjab Pl., p. 159.

[1908] Bunge, Enum., No. 400.