[7] Heer Pflanz. Pfahlb. 27, fig. 16.
[8] Bostock and Riley Nat. Hist. of Pliny. 3:294. 1892.
[9] Koch, K. Dend. 1:94, 96. 1869. Ledebour. Fl. Ross. 2:5. 1829. Boissier. Fl. Orient. 2:652.
[10] Koch, K. Deut. Obst. 146. 1876.
[11] Kalm, Peter Travels into North America 3:240. 1771.
[12] Watson’s Annals of Philadelphia 1:17. 1844.
[13] Mass. Hist. Soc. Collections, 1st Ser. 1:118.
[14] Josselyn, John, Gent. New England Rarities London. 1672.
[15] Samuel Deane, D.D. The New England Farmer or Georgical Dictionary 265. 1797.
[16] Beverly, Robert History of Virginia 279. 1722. Reprint 1855.