2.9. 5. Cottsia Dubard & Dop, Rev. Gén. Bot. 20: 359. 1908.

= Janusia sect. Metajanusia Nied., Verz. Vorles. Königl. Lyceum Hosianum Braunsberg 1912–1913: 50. 1912 ≡ Gaudichaudia sect. Erostratae Chodat, Bull. Soc. Bot. Genève, sér. 2, 9: 100. 1917, nom. superfl. ≡ Aspicarpa sect. Metajanusia (Nied.) Hassl., Annuaire Conserv. Jard. Bot. Genève 20: 212. 1918. Type species: Janusia gracilis A. Gray [≡ Cottsia gracilis (A. Gray) W. R. Anderson & C. Davis].

Type species.

Cottsia scandens Dubard & Dop [= Cottsia californica (Benth.) W. R. Anderson & C. Davis].

Notes.

Cottsia comprises four currently accepted species (one threatened species; Suppl. material 1) of lianas endemic to the seasonally dry tropical forests of Mexico and the United States, North America (POWO 2024). For an identification key for all species of Cottsia, see Anderson and Davis (2007).