Primary tabs


Stomatium Schwantes in Z. Sukkulentenk. 2: 175. 1926 sec. Hartmann (2001b)1
  • 1. Hartmann (2001b)
  • Agnirictus Schwantes in Monatsschr. Deutsch. Kakteen-Ges. 2: 21. 1930, nom. inval., syn. sec. Hartmann (2001b)3,2
  • Stomatium sect. Agnirictus O.H.Volk, Mesembryanthemaceae: 83. 1950, nom. inval., syn. sec. Hartmann (2001b)3
    • Type: not designated
  • 2. Hartmann, H. E. K. 2017 – In: Hartmann, H. E. K., Illustrated handbook of succulent plants. Aizoaceae, ed. 2. – Berlin: Springer, 3. 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.