A critical inventory of the family Amaranthaceae s. str. in Saudi Arabia Author Hassan, Walaa A. 0000-0001-7605-9058 Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt & azmeyw @ gmail. com; https: // orcid. org / 0000 - 0001 - 7605 - 9058 azmeyw@gmail.com Author Al-Shaye, Najla A. 0000-0002-0447-8613 Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia & naaalshaye @ pnu. edu. sa; https: // orcid. org / 0000 - 0002 - 0447 - 8613 naaalshaye@pnu.edu.sa Author Iamonico, Duilio 0000-0001-5491-7568 Department of Environmental Biology, Univeristy of Rome Sapienza, 00185 Rome, Italy & duilio. iamonico @ uniroma 1. it; https: // orcid. org / 0000 - 0001 - 5491 - 7568 duilio.iamonico@uniroma1.it text Phytotaxa 2023 2023-11-28 626 4 223 246 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.626.4.1/51316 journal article 10.11646/phytotaxa.626.4.1 1179-3163 10212988 1.2. Achyranthes sicula (L.) All., Auct. Syn. Meth. Stirp. Hort. Regii Taur.: 41. 1773 ≡ Achyranthes aspera var. sicula L., Sp. Pl.: 204. 1753 . Lectotype (designated by Iamonico 2014: 406): — Herb. Linn. No. 287.1 ( LINN !, image of the lectotype available at https://linnean-online. org/2873/). = Achyranthes argentea Lam., Encycl. 1: 545. 1785 ≡ Achyranthes aspera var. argentea (Lam.) Boiss., Fl. Orient. 4: 993. 1879 . Lectotype (designated by Raus 2022: 337 ): FRANCE . H[ortus] R[egius] Parisiensis (SEVH4073!, image of the lectotype available at https://plants.jstor.org/stable/10.5555/al.ap.specimen.sev-h4073). = Achyranthes argentea var. obovata Moq., Prodr. [A. P. de Candolle] 13(2): 316. 1849. Lectotype (designate here): ― SAUDI ARABIA , Mekkah, Locis cultis ad pagum Madara vallis Fadme prope Meccam , 24 november 1835 , Schimper 944 (G00688924!, image available at http://www.ville-ge.ch/musinfo/bd/cjb/chg/adetail.php?id=668392&base=im g&lang=en); isolectotype at HBG503188! (image of the isolectotype available at https://plants.jstor.org/stable/viewer/10.5555/al.ap. specimen.hbg503188!). Typification of the name Achyranthes argentea var. obovata :― Moquin-Tandon (1849: 316) proposed this new variety to distinguish forms of Achyranthes argentea (currently a heterotypic synonym of Achyranthes sicula : see Raus 2022 ) with leaves circular-ovate and abaxially villous; a syntype (”Prope Meccam (Schimp.! 914, in h. DC)”) was cited. We found this specimen at G (barcode G00688924) and it is here designated as the lectotype of Moquin-Tandon’s varietal name. According to the current concept in Achyranthes (see e.g., Tutin 1993 , Robertson 2003, Iamonico 2017), A. argentea var. obovata is a heterotypic synonym of A. sicula . An isolectotype is deposited at HBG (HBG503188). Chorology:― A species native to the south-eastern Mediterranean region, most of African countries, and Arabian Peninsula (Iamonico 2017, POWO 2023 ). Occurrence in Saudi Arabia :― Al-Madinh, ʿAsīr, Jazan , and Mekkah ( Miller & Cope 1996 , Collenette 1999 ). Specimina visa selecta:— SAUDI ARABIA . Mekkah , Locis cultis ad pagum Madara vallis Fadme prope Meccam , 24 november 1835 , Schimper 944 (M0241524!).