Abstract
Chenopodium hoggarense Uotila & C. Chatel., a new species of the family Amaranthaceae s.l. (Chenopodiaceae s.str.) from the Hoggar and Tibesti mountains of the Sahara, in Algeria and Chad, is described and illustrated. The species was found in quantities from the Hoggar (Ahaggar) mountains in 2019. It had been observed there earlier several times, but it was confused with C. vulvaria L. because of its similar smell and dense cover of vesicular hairs. However, it differs from C. vulvaria in growth habit, leaf shape and flower characters. Its relationships to and the identity of C. vulvaria var. incisum Maire are discussed and var. incisum is lectotypified. Chenopodium hoggarense is known only from the isolated Hoggar and Tibesti mountains. Citation: Chatelain C., Uotila P., Benhouhou S., Mombrial F., Mesbah M., Baa S. & Benghanem A. N. 2022: Chenopodium hoggarense (Amaranthaceae), a new species from Algeria and Chad. – Willdenowia 52: 75–81. Version of record first published online on 14 March 2022 ahead of inclusion in April 2022 issue.
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