4.12. Amaranthus viridis L., Sp. Pl., ed. 2. 2: 1405. 1763.

Lectotype (designated by Fawcett & Rendle 1914: 131):— Herb. Linn. No. 1117.15 (LINN!, image of the lectotype available at http:// linnean-online.org/11641/).

Alien status:― Neophyte, native to South America; it can be considered as naturalized in Saudi Arabia (see Chaudhary 1998, Hassan et al. 2022).

Occurrence in Saudi Arabia:― Al hudud ash Shamaliyah (Osman & El-Ameid Abedin 2019), Bisha (Abbas et al. 2020), Jizan and Makkah (Miller & Cope 1996), Taif (Abdullah et al. 2017).

Specimina visa selecta:― SAUDI ARABIA, Jizan, human-made habitat, (coastal plain) 5–15 m, 17 Feb 2021, leg. Masrhai et Al-shaye, det. Masrhai, conf. Iamonico (RO!).