[1649] Steven, Verzeichniss, p. 134.
[1650] Alefeld, Bot. Zeitung., 1860, p. 204.
[1651] Darwin, Animals and Plants under Domestication, p. 326.
[1652] Theophrastus, Hist., lib. viii. c. 3 and 5.
[1653] Heldreich, Nutzpflanzen Griechenlands, p. 71.
[1654] Pliny, Hist., lib. xviii. c. 7 and 12. This is certainly P. sativum, for the author says it cannot bear the cold.
[1655] Ad. Pictet, Origines Indo-Européennes, edit. 2, vol. i. p. 359.
[1656] Heer, Pflanzen der Pfahlbaüten, xxiii. fig. 48; Perrin, Études Préhistoriques sur la Savoie, p. 22.
[1657] Piddington, Index. Roxburgh does not give a Sanskrit name.
[1658] Bretschneider, Study and Value, etc., p. 16.