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Issue: Vol. 626 No. 4: 28 Nov. 2023
Type: Article
Published: 2023-11-28
DOI: 10.11646/phytotaxa.626.4.1
Page range: 223-246
Abstract views: 158
PDF downloaded: 17

A critical inventory of the family Amaranthaceae s.str. in Saudi Arabia

Botany and Microbiology Department; Faculty of Science; Beni-Suef University; Beni-Suef; Egypt
Department of Biology; College of Science; Princess Nourah bint Abdulrahman University; Riyadh; Saudi Arabia
Department of Environmental Biology; Univeristy of Rome Sapienza; 00185 Rome; Italy
Aliens Asia flora morphology new record typification Eudicots

Abstract

The aims of the present study are to assess and update the floristic diversity of Amaranthaceae s.str. in Saudi Arabia. A total number of 33 taxa were indentified including 28 species, 4 subspecies, and 7 varieties. The richest genus is Amaranthus with 16 taxa (12 species); Aerva and Alternanthera have 3 species each; Achyranthes and Celosia 2 species each; 6 genera (Digera, Gomphrena, Nothosaerva, Psilotrichum, Pupalia, Saltia) include just one species each. Most of the taxa are native (18, 54.55%), 14 (42.42%) are aliens (6 casual taxa, 5 naturalized, and 1 invasive), one (Alternanthera sessilis) is here considered as doubtfully native, two (Amaranthus tricolor, Gomphrena globosa) are found only in cultivation. Two species (Amaranthus tortuosum, Pupalia lappacea var. lappacea) are excluded from the national flora. Diagnostic keys at genus, species, and infraspecific ranks are provided. The following names are lectotypified: Achyranthes argentea var. obovata (G; isolectotype at HBG), Achyranthes fruticosa var. pubescens (G), Achyranthes papposa (C; isolectotypes at C and BM), Achyranthes polystachya (BM), Aerva javanica var. bovei (FI), Achyranthes lanata (illustration by Burman), Digera arvensis (C; isolectotype at C), Psilostachys gnaphalobryum (TUB; isolectotypes at GOET, HBG, HEID, JE, MEL, MPU, P, and TUB), Telanthera bettzickiana (LE).

 

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