Gray, S.F., 1821
Gray, S.F. (1821). A natural arrangement of British plants, according to their relations to each other, as pointed out by Jussieu, De Candolle, Brown, &c. including those cultivated for use; with an introduction to botany, in which the terms newly introduced are explained; illustrated by figures. pp. vol. 1: [i]-xxviii, - 824, pls I-XXI plates. London: Printed for Baldwin, Cradock & Joy, Paternoster-Row.
1 Nov. 1821
Publication of vol. 1 may have been a month earlier than Vol 2 (; vol. 2: viii, 757) (see TL-2). The algae are in Vol. 1