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Grubbia is a genus of .Vernon H. Heywood, Richard K. Brummitt, Ole Seberg, and Alastair Culham. 2007. Flowering Plant Families of the World. Firefly Books: Ontario, Canada. . It is the sole genus in the family Grubbiaceae. Grubbiaceae Endl. ex Meisn. Plants of the World Online. Retrieved 21 June 2023. The genus has three species, all Endemism to the Cape Floristic Region of South Africa.David J. Mabberley. 2008. Mabberley's Plant-Book third edition (2008). Cambridge University Press: UK. They are that grow to tall, with tiny and slender, leathery Leaf.Klaus Kubitzki. 2004. "Grubbiaceae". pages 199-201. In: Klaus Kubitski (editor). The Families and Genera of Vascular Plants volume VI. Springer-Verlag: Berlin;Heidelberg, Germany. The fruit is a Multiple fruit.
Grubbia was Botanical name by Peter Jonas Bergius in 1767 in a Swedish journal entitled Kongliga Vetenskaps Academiens Handlingar. Grubbia in International Plant Names Index. (see External links below). The generic name honors the Swedish botanist Michael Grubb.Umberto Quattrocchi. 2000. CRC World Dictionary of Plant Names volume II. CRC Press: Boca Raton; New York; Washington,DC;, US. London, UK. (vol. II). (see External links below).
Grubbia was revised by Sherwin Carlquist in 1977.Sherwin Carlquist. 1977. "A revision of Grubbiaceae". Journal of South African Botany (currently: South African Journal of Botany). 43(2):115-128. Grubbia gracilis, Grubbia hirsuta, and Grubbia pinifolia had all been recognized, at least by some authors, at species Taxonomic rank, but Carlquist treated them as subspecies or varieties of Grubbia rosmarinifolia. Some authors had recognized a second genus, Strobilocarpus, in the family Grubbiaceae, but Carlquist assigned its two species, Strobilocarpus rourkei and Strobilocarpus tomentosa to Grubbia.
Molecular phylogenetic Research have shown that Grubbia is sister taxon to Curtisia, another genus from South Africa.Qiu-Yun (Jenny) Xiang, David T. Thomas, and Qiao Ping Xiang. 2011. "Resolving and dating the phylogeny of Cornales - Effects of taxon sampling, data partitions, and fossil calibrations". Molecular Phylogenetics and Evolution 59(1):123-138. It has been suggested that Grubbia and Curtisia might be combined into a single family."Jenny" Qiu-Yun Xiang, Michael L. Moody, Douglas E. Soltis, Chuan Zhu Fan, and Pamela S. Soltis. 2002. "Relationships within Cornales and circumscription of Cornaceae - matK and rbcL sequence data and effects of outgroups and long branches". Molecular Phylogenetics and Evolution 24(1):35-57. This was not followed by the Angiosperm Phylogeny Group in the APG III system of 2009.
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