Titanopsis

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Titanopsis
Titanopsis calcarea.jpg
Titanopsis calcarea in cultivation
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Aizoaceae
Subfamily: Ruschioideae
Tribe: Ruschieae
Genus: Titanopsis
Schwantes
Species

See text

Synonyms [1]

VerruciferaN.E.Br.

Titanopsis is a genus of about four species [1] of succulent plants of the family Aizoaceae, indigenous to the arid regions of South Africa and Namibia.

Contents

The name Titanopsis is derived from the Greek (god), Titan , the sun, and opsis, appearance, from the sun-like appearance of the flower. [2]

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] [3]

Description

Titanopsis hugo-schlechteri, showing the genus's distinctively warty leaf tubercles. Titanopsis hugo-schlechteri - Cape Town cultivation.jpg
Titanopsis hugo-schlechteri, showing the genus's distinctively warty leaf tubercles.

Titanopsis succulents are small plants, often found growing low to the ground with a thick root system that branches out six to ten times.

The plant itself is often hidden by its own leaves, which grows in clusters of four to eight, forming a rosette pattern. These leaves have a truncate tip and rough warty little tubercles at the apex of the leaves. When fully grown, the leaves range from 20–25 mm (0.79–0.98 in) long.

The tips of the leaves have been noted to resemble limestone, allowing the plant to blend into its surroundings in its natural rocky habitat.

In the fall, the plant produces one to three yellow flowers with a 2 cm (0.79 in) diameter. These flowers lack any extra bracts [4]

Species

Plants of the World Online accepts the following species: [1]

ImageScientific nameDistribution
Titanopsis calcarea.jpg Titanopsis calcarea (Marloth) Schwantes South Africa
Titanopsis hugo-schlechteri flower.jpg Titanopsis hugo-schlechteri (Tischer  [ es ]) Dinter & SchwantesNamibia & South Africa
Titanopsis primosii.jpg Titanopsis primosii L.Bolus ex S.A.Hammer South Africa
Titanopsis schwantesii KDNBG.jpg Titanopsis schwantesii (Dinter ex Schwantes) SchwantesNamibia & 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

  1. 1 2 3 4 "Titanopsis Schwantes". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 23 June 2025.
  2. Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names](pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN   978-3-946292-41-8. S2CID   246307410 . Retrieved January 27, 2022.
  3. "Titanopsis". Succulent Guide.
  4. Hartmann, Heidrun E. K., ed. (2017). Aizoaceae. Illustrated Handbook of Succulent Plants (2nd ed. 2017 ed.). Berlin, Heidelberg: Springer. ISBN   978-3-662-49258-1.