Jean-François Séguier (French pronunciation: [ʒɑ̃ fʁɑ̃swa segje]; 25 November 1703 – 1 September 1784) was a French archaeologist, epigraphist, astronomer and botanist from Nîmes.
He studied law in Montpellier, during which time, he developed a passion for botany. He was a friend and collaborator to Scipio Maffei, with whom he took an extended scientific tour throughout Europe (1732–36). In 1755 he became a member of the Académie de Nîmes, serving as its secrétaire perpétuel from 1765 to 1784. In 1772 he became a member of the Académie royale des Inscriptions et Belles-Lettres.
The plant genus Seguieria (family Petiveriaceae, Loefl., 1758) commemorates his name, as do the botanical species Ranunculus seguieri (Vill., 1779), Euphorbia seguieriana (Neck., 1770), and Dianthus seguieri (Vill., 1779).
His written works include a detailed description of the flora in the vicinity of Verona, titled Plantae Veronenses, seu Stirpium quae in agro Veronensi repriuntur (3 volumes 1745–54). Other noted works associated with Séguier are:
Bibliotheca botanica, sive, Catalogus auctorum et librorum omnium qui de re botanica, de medicamentis ex vegetabilibus paratis, de re rustica, & de horticultura tractant, 1740. Séguier's Bibliotheca botanica includes Ovidio Montalbani's Bibliotheca botanica as an appendix.
Bibliotheca botanica (in Latin). Den Haag: Jean Neaulme. 1740.
Plantae veronenses (in Latin). Vol. 1. Verona: Tipografia del Seminario. 1745.
Plantae veronenses (in Latin). Vol. 2. Verona: Tipografia del Seminario. 1745.
Dissertation sur l'ancienne inscription de la Maison-carrée de Nismes, 1759 – Dissertation on the ancient inscriptions of the Maison Carrée in Nîmes.
Jean-François Séguier, Pierre Baux, lettres : 1733-1756.
The standard author abbreviation Ség. is used to indicate this person as the author when citing a botanical name.