MSS. 2970-80), which was completed before 1708, attributes to him the finding of Mentha pubescens "about some ponds near Marybone", and of the plant styled by James Petiver "Rand's Oak Blite" (Chenopodium glaucum).

In 1707 Rand, and nineteen other members, including Petiver and Joseph Miller, took a lease of the Chelsea garden, to assist the Society of Apothecaries,