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This species is accepted, and its native range is Macaronesia, Medit. to S. Pakistan and Senegal, Angola, Arabian Peninsula.
Arthrocaulon macrostachyum


M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008]

Morphology General Habit
Much branched shrub, 0.3–1 m high; stems erect to ascending, sometimes rooting at base
Morphology Stem
Internodes cylindrical or club-shaped, up to 7 mm long, glaucous, free leaf-tips forming short wide 2-lobed cupule
Morphology Reproductive morphology Inflorescences
Flowering branches erect with terminal, cylindrical, obtuse spikes 30–60 x 3–4 mm
Morphology Reproductive morphology Flowers
Flowers in 3’s, protruding by up to 1/3rd the length of the internode
Morphology Reproductive morphology Flowers Perianth
Perianth 3-dentate, conical
Morphology Reproductive morphology Fruits
Pericarp membranous
Morphology Reproductive morphology Seeds
Seed c. 1 mm long, black, shining, densely papillate, verrucose on back.
N1–3; S1 Mediterranean coasts, Red Sea coasts, extending north to Jordan Valley.
Altitude range: near sea level–400 m.
Horun (Somali)
This species has a confused nomenclatural history which is set out more fully than usual.

Native to:

Albania, Algeria, Angola, Baleares, Canary Is., Cape Verde, Corse, Cyprus, East Aegean Is., Egypt, Eritrea, France, Greece, Gulf States, Iran, Italy, Kriti, Lebanon-Syria, Libya, Mauritania, Morocco, Oman, Pakistan, Palestine, Portugal, Sardegna, Saudi Arabia, Senegal, Sicilia, Sinai, Socotra, Somalia, Spain, Sudan, Tunisia, Turkey, Western Sahara, Yemen, Yugoslavia

Arthrocaulon macrostachyum (Moric.) Piirainen & G.Kadereit appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 1, 2015 Rechninger, K.H. [374], France Arthrocnemum macrostachyum K000608112

First published in Taxon 66: 123 (2017)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. Scientific Data 8: 215.


Kew Backbone Distributions

  • Authier, P. & Covillot, J. (2011). Catalogue actualisé des plantes de l'île de Rhodes (Grèce) Saussurea; Travaux de la Société Botanique de Genève 41: 131-170.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
  • Hedge, I.C., Akhani, H., Freitag, H., Kothe-Heinrich, G., Podlech, D., Rilke, S. & Uotila, P. (1997). Flora Iranica 172: 1-371. Naturhistorisches Museums Wien.
  • Miller, A.G. & Cope, T.A. (1996). Flora of the Arabian peninsula and Socotra 1: 1-586. Edinburgh university press.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  • Mosti, S., Raffaelli, M. & Tardelli, M. (2012). Contributions to the flora of central-southern Dhofar (Sultanate of Oman) Webbia; Raccolta de Scritti Botanici 67: 65-91.
  • Thulin, M. (ed.) (1993). Flora of Somalia 1: 1-493. The Royal Botanic Gardens, Kew.

Flora of Somalia
Flora of Somalia

Herbarium Catalogue Specimens

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 World Checklist of Selected Plant Families.

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at and
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families.

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew