Carlo Allioni (23 September 1728 in Turin – 30 July 1804 in Turin) was an Italian physician and professor of botany at the University of Turin.^[1] His most important work was Flora Pedemontana, sive enumeratio methodica stirpium indigenarum Pedemontii^{[citation needed]} 1755, a study of the plant world in Piedmont, in which he listed 2813 species of plants, of which 237 were previously unknown.^{[citation needed]} In 1766, he published the Manipulus Insectorum Tauriniensium.

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In April, 1758 he was elected a Fellow of the Royal Society.^[2]

He was appointed extraordinary professor of botany at the University of Turin in 1760 and was also the director of the Turin Botanical Garden. The journal Allionia: bollettino dell' istituto ed orto botanico dell' università di Torino is named after him.^[3]

First Pehr Löfling and then Linnaeus named the New World herb genus Allionia (Nyctaginaceae) after Allioni.^[3][4] Per Axel Rydberg named the genus Allioniella (now a taxonomic synonym for Mirabilis), after him.

Also named after him are:

• Arabis allionii
• Jovibarba allioni
• Primula allioni
• Veronica allionii

• Flora Pedemontana, sive, Enumeratio methodica stirpium indigenarum Pedemontii, Turin, 1755.
• Stirpium praecipuarum litoris et agri Nicaensis, Turin, 1755.
  • Stirpium praecipuarum littoris et agri Nicaeensis enumeratio methodica (in Latin). Paris: Jean Baptiste Claude Bauche (2.). 1757.
• Auctarium ad floram Pedemontanam cum notis et emendationibus (1789)
• Stirpium praecipuarum littoris et agri Nicaeensis Enumeratio methodica cum Elencho aliquot anirnalium ejusdem maris (1757)