Gibbaeum

Familia: Aizoaceae
Subfamilia: Ruschioideae
Tribus: Ruschieae
Genus: Gibbaeum
Sectiones: G. sect. Gibbaeum – G. sect. Mentocalyx

Species: G. album – G. angulipes – G. dispar – G. esterhuyseniae – G. fissoides – G. geminum – G. gibbosum – G. haaglenii – G. hartmannianum – G. heathii – G. hortenseae – G. ihlenfeldtii – G. nebrownii – G. nuciforme – G. pachypodium – G. petrense – G. pilosulum – G. pubescens – G. shandii – G. velutinum
Source(s) of checklist:

Hassler, M. 2018. Gibbaeum. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2018 Jul. 07. Reference page.

Name

Gibbaeum Haw. ex N.E.Br., Gard. Chron. ser. 3, 71: 129 (1922).

Lectotype species: Gibbaeum pubescens (Haw.) N.E.Br., designated by N.E. Brown in E.P. Phillips, Gen. S. African Fl. Pl. 242 (1926).

References
Primary references

Brown, N.E. 1922. The Gardeners' Chronicle: a weekly illustrated journal of horticulture and allied subjects. ser. 3 78: 413.

Additional references

Thiede, J. & Niesler, I.M. 2012. Taxonomy of the genus Gibbaeum (Aizoaceae) and clarification of the confusion around Gibbaeum haagei, with a new species Gibbaeum hartmannianum. Haseltonia 18: 34–44. ResearchGate Reference page.

Links

Hassler, M. 2018. Gibbaeum. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2018 Jul. 07. Reference page.
International Plant Names Index. 2018. Gibbaeum. Published online. Accessed: Jul. 07 2018.
The Plant List 2013. Gibbaeum in The Plant List Version 1.1. Published on the internet. Accessed: 2018 Jul. 07.
Tropicos.org 2018. Gibbaeum. Missouri Botanical Garden. Published on the internet. Accessed: 2018 Jul. 07.
Global Biodiversity Information Facility. 2019. GBIF Backbone Taxonomy. Checklist dataset. Taxon: Gibbaeum.

Gibbaeum is a genus of about 21 species of small succulent plants of the family Aizoaceae, indigenous to the Little Karoo region of South Africa. The name "Gibbaeum" comes from the Latin gibbosus (hunchback)

Description
Gibbaeum pubescens in natural habitat.

These dwarf succulents are characterized by distinctively asymmetrical pairs of leaves, mostly globular or sometimes thick and arcuate. The sizes of the leaves of each pair are nearly always different. Gibbaeums grow in clumps and produce pink or white flowers in spring.[1][2]
Distribution

Genus Gibbaeum is predominantly indigenous to the Little Karoo region of the Western Cape Province, South Africa. A few species extend outside of this region. Three species extend north into the Great Karoo region: Gibbaeum gibbosum, Gibbaeum heathii and Gibbaeum nuciforme. Two extend south into the Overberg region: Gibbaeum esterhuyseniae and Gibbaeum hartmannianum.
Cultivation

Sunny exposure and well drained soil. Their natural range spans the boundary between winter and summer rainfall areas of southern Africa, and their growth period (emergence of new leaves and flowering) is therefore in summer for some species and in winter for other ones. However, overall most species can be watered primarily in winter. Temperature must stay above 10 °C in winter.

Propagation can be done by cuttings or by seeds. Many of the species hybridise easily - with each other and with the related genus Muiria.
List of species

Gibbaeum album
Gibbaeum angulipes
Gibbaeum blackburniae
Gibbaeum comptonii
Gibbaeum dispar
Gibbaeum esterhuyseniae
Gibbaeum geminum
Gibbaeum gibbosum
Gibbaeum hartmannianum
Gibbaeum heathii
Gibbaeum luckhofii
Gibbaeum nebrownii
Gibbaeum nuciforme
Gibbaeum pachypodium
Gibbaeum petrense
Gibbaeum pilosulum
Gibbaeum pubescens
Gibbaeum schwantesii
Gibbaeum velutinum

References

http://www.succulentguide.com/cactus/?genus=Gibbaeum
http://redlist.sanbi.org/genus.php?genus=114