[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.