[853] Linn., Tour in Lapland, vol. ii. p. 282.
[854] Fries, cited by Lindley, Introd. to Nat. Syst. of Botany.
[855] System of Physiological Botany, vol. ii. p. 405.
[856] Brown, Append. to Tuckey, No. v. p. 481.
[857] Phil. Trans. 1696.
[858] System of Physiological Botany, vol. ii. p. 403.
[859] Greville, Introduction to Algæ Britannicæ, p. 12.
[860] Linnæus, Amœn. Acad., vol. ii. p. 409.
[861] Amœn. Acad., vol. iv. Essay 75. § 8.
[862] Ibid., vol. vi. § 22.