Biology:Pleiospilos nelii
| Pleiospilos nelii | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Aizoaceae |
| Genus: | Pleiospilos |
| Species: | P. nelii
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| Binomial name | |
| Pleiospilos nelii Schwantes
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| Synonyms | |
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Pleiospilos nelii, the split rock, splitrock or living granite,[1] is a species of flowering plant in the family Aizoaceae, native to South Africa. It grows in semi-arid areas with rainfall of between 150mm and 300mm, in the Karoo of South Africa.[2]
Etymology
The species epithet nelii honours the South African botanist Gert Cornelius Nel. The common name "split rock" refers to the appearance of the plant's leaves.[3]
Description
Pleiospilos nelii is a succulent perennial which can reach a height of 5–8 cm (2–3 in) and a diameter of about 10 cm (4 in). This very short-stemmed, nearly stemless plant has one or more pairs of opposite, almost hemispherical, grey-green or brownish leaves. The surface of the leaves has many small dark spots. A new pair of leaves is produced each year, replacing an older pair. This plant closely resembles a small cracked rock (hence the common name), an appearance which may have evolved as a defence against herbivory. The superficially daisy-like flowers are yellow-orange, 6–7.5 cm (2–3 in) across, and emerge from the plant's apical bud. The flowers are large in relation to the size of the plant. Each flower opens in the afternoon and closes at sunset, over a bloom period of several days.[4]
Cultivation
P. nelii is one of several plants cultivated for their rocklike appearance. They are sometimes collectively called mesembs.[5] In temperate regions it is grown under glass for protection from excessive rain and hard freezes. It has gained the Royal Horticultural Society's Award of Garden Merit.[6][7]
Gallery
Plants with roots
References
- ↑ "Stone Plant (Pleiospilos spp.) - Plants | Candide Gardening". https://candidegardening.com/GB/plants/2dbc266c-1b9c-4e2b-b8a5-edda4bc97ac1.
- ↑ "Pleiospilos nelii". Llife. http://www.llifle.com/Encyclopedia/SUCCULENTS/Family/Aizoaceae/14724/Pleiospilos_nelii.
- ↑ "Pleiospilos nelii". http://www.plantzafrica.com/plantnop/pleiospilosnelii.htm.
- ↑ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. pp. 1136. ISBN 978-1405332965.
- ↑ "The New Mastering the Art of Growing Mesembs by Steven Hammer". https://files.nyu.edu/ms689/public/AGM.html#pleiospilos.
- ↑ "RHS Plant Selector - Pleiospilos nelii ". https://www.rhs.org.uk/Plants/131621/Pleiospilos-nelii/Details.
- ↑ "AGM Plants - Ornamental". Royal Horticultural Society. July 2017. p. 80. https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf. Retrieved 7 May 2018.
Bibliography
- AFPD. 2008. African Flowering Plants Database - Base de Donnees des Plantes a Fleurs D'Afrique.
- Gibbs Russell, G. E., W. G. Welman, E. Reitief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. v. Wyk & A. Nicholas. 1987. List of species of southern African plants. Mem. Bot. Surv. S. Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).
- Fl. Pl. Africa 47: t.1865B (1983).
- Bot. Jahrb. Syst. 106: 475 (1986).
- Il. Handbook succulent plants: Aizoaceae F-Z : 220 (2001).
- Aloe 43[2&3]: 31 (2006).
Wikidata ☰ Q7204480 entry
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