Discusses 'Dianthus caryophyllus' and proposes two additions to Smith's description of the genus, being 'caryophyllus' and 'hortensia', with three small sketches in pen illustrating his argument. Justifies his course of study.

Observations on the two kinds of 'Dianthus' termed by gardeners "pink & carnation"; argues that they are not both 'Caryophyllus', as Smith determines them in "Flora Britannica", and proposes 'Caryophyllus' and 'Hortensis'; provides characters with three small ink sketches of plant details.

Criticises tendency for botanists to determine a plant at first glance without investigating its characteristics or examining whether existing descriptions are correct, so that incorrect specific distinctions are copied from edition to edition, even though they are useless for identification purposes.

[Note at head verso of first folio: "Read Dec. 15 1807"]