Confesses to an error he made in his last letter to Smith regarding 'Sisymbrium monense', which he now supposes to be the variety of 'Erysimum barbarea' Smith refers to in "English Botany" and now has two seedlings of it growing, description of characteristics, differing "very considerably from the American Cress". Having compared prints of 'Melittis grandiflora' and 'Melittis melissopyllum' from "English Botany" concludes that he has never found the latter plant. The 'Lotus' he sent Smith has since been sent to the Oxford Botanic Garden by [James] Dickson. Notes a habitat for 'Convolvulus sepium'. Description and habitat for 'Verbascum blattaria'. Habitat for the 'Inula miginosa' of [John] Sibthorp, suggests [William] Withering's suggsted name of 'cylindrica' is improper, as is Sibthorp's. Glad to hear that Smith is undertaking publication of "Flora Graeca".