Candolle's laws of botanical nomenclature

CANDOLLE, AUGUSTIN-PYRAMUS DE. Regni vegetabilis systena naturale, sive ordines, genera et species plantarum secundum methodi naturalis normas digestarum et descriptarum. I-II. Paris (Treuttel et Würtz) 1818-21.8:o. (4), (1)-564; (4), (1)-745, (1 blank) pp. 1 folding printed table.Later (early 20th century) dark brown half morocco, very slightly worn, somewhat faded gilt spines, shaved red upper edges, otherwise uncut. (Bound at Nordiska bokhandeln in Stockholm). Some foxing. Signature on halftitles, Folke Nord Upsala 1916. First edition. 2 volumes.Rare first edition of Candolle's "Regni vegetabilis systema naturale" (Natural Classification for the Plant Kingdom), outlining systematic laws of botanical nomenclature.