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Stomatium Schwantes in Z. Sukkulentenk. 2: 175. 1926 sec. Hartmann (2001b)1 wfo-4000036778
      Type: Stomatium suaveolens Schwantes
  • 1. Hartmann (2001b)
  • Agnirictus Schwantes in Monatsschr. Deutsch. Kakteen-Ges. 2: 21. 1930, nom. inval. syn. sec. Hartmann (2001b)2 wfo-4000000962
  • Stomatium sect. Agnirictus O.H.Volk, Mesembryanthemaceae: 83. 1950, nom. inval. syn. sec. Hartmann (2001b)2 wfo-3400012221
    • Type: not designated
  • 2. Hartmann (2001b)


Stomatium currently includes 39 species, but lacks a taxonomic revision. It was shown to be closely related to Neohenricia (2 spp.), Mossia (1 sp.), Chasmatophyllum (8 spp.), Rhinephyllum (11 spp.) and Peersia (3 spp.) by Klak & al. (2013). Both Rhinephyllum and Chasmatophyllum also lack a taxonomic revision. All of these genera occur outside the winter-rainfall region of South Africa. The group shares a similar floral morphology, i.e. yellow or more rarely cream-coloured petaloid staminodes, absence of filamentous staminodes and a concavely shaped ovary wall. Over the past decades species have been shifted between genera since generic boundaries are poorly circumscribed.A,B


A. Hernández-Ledesma, P., Berendsohn, W. G., Borsch, T., von Mering, S., Akhani, H., Arias, S., Castañeda-Noa, I., Eggli, U., Eriksson, R., Flores-Olvera, H., Fuentes-Bazán, S., Kadereit, G., Klak, C., Korotkova, N., Nyffeler, R., Ocampo, G. & Ochoterena, H. 2015: A taxonomic backbone for the global synthesis of species diversity in the angiosperm order Caryophyllales. – Willdenowia 45(3): 281-383.
B. Klak, C., Hanáček, P. & Bruyns, P. V. 2013: A phylogenetic hypothesis for the recently diversified Ruschieae (Aizoaceae) in southern Africa. – Molecular Phylogenetics and Evolution 69: 1005-1020.