Titanopsis

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Caryophyllales

Familia: Aizoaceae
Subfamilia: Ruschioideae
Tribus: Ruschieae
Genus: Titanopsis
Species: T. calcarea – T. hugo-schlechteri – T. schwantesii
Name

Titanopsis Schwantes, Z. Sukkulentenk. 2: 178. 1926.
Type species: Titanopsis calcarea (Marloth) Schwantes

Homonym: Titanopsis de Folin, 1887, Foraminifera

References

Schwantes, M.H.G. (1926) Z. Sukkulentenk. 2: 178.

Links

Hassler, M. 2018. Titanopsis. 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. 14. Reference page.
International Plant Names Index. 2018. Titanopsis. Published online. Accessed: Jul. 14 2018.
The Plant List 2013. Titanopsis in The Plant List Version 1.1. Published on the internet. Accessed: 2018 Jul. 14.
Tropicos.org 2018. Titanopsis. Missouri Botanical Garden. Published on the internet. Accessed: 2018 Jul. 14.
Global Biodiversity Information Facility. 2019. GBIF Backbone Taxonomy. Checklist dataset. Taxon: Titanopsis. .

Vernacular names

Titanopsis is a genus of about 10 species of succulent plants of the family Aizoaceae, indigenous to the arid regions of South Africa and Namibia. The name "Titanopsis" comes from the ancient Greek "titanos" (limestone) and "opsis" (looking like)

Distribution

The genus has a disjunct distribution, occurring in three separate areas of southern Africa: southern Namibia, the region around the south-eastern border of Namibia and a larger area spanning between the former Cape Province and Orange Free State in South Africa. This unusual distribution means that the different Titanopsis species live in different rainfall systems - either summer or winter rainfall depending on the species.[1]
Description

Titanopsis hugo-schlechteri, showing the genus's distinctively warty leaf tubercles.

They are small plants, with rosette up to 10 cm high.

Leaves are up to 3 cm with truncate tip and rough warty little tubercles at the apex of the leaves. They look like limestone and are hard to see in the wild.

Yellow flowers with 2 cm diameter appear in late fall.
Species

Plants of the World Online accepts the following species:[2]

Image	Scientific name	Distribution
	Titanopsis calcarea (Marloth) Schwantes	South Africa
	Titanopsis hugo-schlechteri (Tischer [es]) Dinter & Schwantes	Namibia & South Africa
	Titanopsis primosii L.Bolus ex S.A.Hammer	South Africa
	Titanopsis schwantesii (Dinter ex Schwantes) Schwantes	Namibia & South Africa

Cultivation

Cultivation is easy with full sun, very well-drained soil, and attention to the natural rainfall of the particular species' habitat.

The more popular species from the eastern areas, such as Titanopsis calcarea, fulleri and luederitzii are adapted to summer rainfall, while those from further west, rarer species such as Titanopsis schwantesii and hugo-schlecteri, are adapted to winter rainfall, when they also flower.

The plants are calcicole (=they appreciate calcareous soils), but any typical loose succulent soil mix is suitable. Division of larger clumps is possible in some cases, but as most species have tuberous rootstocks and offset slowly, seed production is the most common method of propagation.
References

http://www.succulentguide.com/cactus/?genus=Titanopsis&PHPSESSID=899833d41a99244e7a431c09b5eef985
"Titanopsis Schwantes". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 1 February 2019.
русский: Титанопсис