Lithops francisci

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Lithops francisci
Lithops francisci-IMG 0401.JPG
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Aizoaceae
Genus: Lithops
Species:
L. francisci
Binomial name
Lithops francisci

Lithops francisci, commonly known as one of the living stones or pebble plants, is in the family Aizoaceae. It is endemic to the arid desert environments of Namibia. It is a succulent with a natural habitat in rocky areas. L. francisci was assessed by Nicholas Edward Brown in 1925. [3] It is one of the Lithops plants and shares the characteristic bi-leaf head pattern separated by a deep fissure, the bottom of which houses and protects the stunted stem.

Contents

Discovery and etymology

L. francisci was first sampled by Kurt Dinter in July 1922 during a research expedition to southern Africa. In 1926, he published his description of the species, naming it after a friend, the Dutch horticulturist Frantz de Laet of Contich. [3]

Habitat and ecology

L. francisci is a desert perennial. It thrives in climates that are dry and have moderately low annual temperatures. It requires coarse, well-drained sandy soils and is therefore usually found on rocky hillsides. Its habitat tends to have a lot of metamorphic rock such as schist and gneiss, which also matches the natural coloration of the plant. This adaptation acts as a camouflage, preventing easy predation of the plant's succulent, nutrient rich tissue. [3] The annual rainfall in the population range of L. francisci varies from 0 to 99 millimetres (0.0 to 3.9 in) per year, [4] and temperatures fluctuate in the range 9–20 °C (48–68 °F). [5]

Distribution

L. francisci is native to Namibia in southern Africa, more specifically, the coastal desert of Namib. It can be found in the southern hills of both Kovisberg and Halenberg. This location was affirmed by horticulturist Werner Tribner, who also studied Lithops and had a species named after him, L. werneri . After its initial discovery in the southern hills, it was also spotted further northeast, in the Konipberg mountains, roughly 65 kilometres (40 mi) north of Lüderitz. [3]

Due to the popularity of this species, as well as many of the other Lithops in the succulent plant trade, it can be found in markets across the world. L. francisci was once sold and harvested to the point of threatening the endemic population. Over the past 100 years, thousands of these plants have been dug up and exported from their native habitat. This practice has significantly decreased the effective population size within the small (< 625 square kilometres or 241 square miles) range of natural occurrence. However, the IUCN reports a decrease in this activity over the last 15 years and though population size and range is still decreasing, the pace has begun to slow. [1]

Morphology

L. francisci is a short succulent dicot with multiple heads (usually three to six, but ranging up to 20). Each head consists of two short thick modified leaves separated by a deep fissure. The face of both leaves are rugose with small channels usually of a different color than the bumps. There are also many dusky dots on the face of the leaf, which are irregularly spread across the entire upward-facing surface. Both the dusky dots and the channels usually appear as greyish-green and the elevated tissue tends to have a cream or beige coloring. Pink, green and yellow tinges have also been observed in the elevated tissue. It has a small and squat stature, with the diameter of the larger leaf averaging at about 24 mm (0.94 in), though they have been known to exceed 30 mm (1.2 in). [3]

Reproduction

These plants produce small yellow flowers during their reproductive season in the autumn. Each head only produces a single flower. The flower emerges as a bud which rises from the central fissure, separating the bifurcated leaves.

L. francisci is an obligate outcrosser and pollinated flowers produce a capsule. The capsules usually have five locules, occasionally six. The seeds are yellow to yellowish brown and have a rugose texture coating similar to that of the modified leaf. [3]

Related Research Articles

<span class="mw-page-title-main">Aizoaceae</span> Family of dicotyledonous flowering plants

The Aizoaceae, or fig-marigold family, is a large family of dicotyledonous flowering plants containing 135 genera and about 1800 species. They are commonly known as ice plants or carpet weeds. They are often called vygies in South Africa and New Zealand. Highly succulent species that resemble stones are sometimes called mesembs.

<i>Lithops</i> Genus of plants

Lithops is a genus of succulent plants in the ice plant family, Aizoaceae. Members of the genus are native to southern Africa. The name is derived from the Ancient Greek words λίθος 'stone' and ὄψ 'face', referring to the stone-like appearance of the plants. They avoid being eaten by blending in with surrounding rocks and are often known as pebble plants or living stones. Lithops is both the genus name and the common name. The formation of the name from the Ancient Greek -ops means that even a single plant is called a Lithops.

<i>Aloe comosa</i> Species of plant in the family Asphodelaceae

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<i>Gonialoe dinteri</i> Species of plant in the family Asphodelaceae

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<i>Hoodia juttae</i> Species of plant

Hoodia juttae is a species of plant in the family Apocynaceae. It is endemic to Namibia. Its natural habitats are rocky areas and cold desert. H. juttae is found around the Little and Great Karas mountains. It is threatened by collection. The plant was discovered by Jutta Dinter, the wife of botanist, Kurt Dinter in 1913. The scientific name refers to Jutta.

<span class="mw-page-title-main">Succulent plant</span> Plants having some parts that are more than normally thick and fleshy

In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word succulent comes from the Latin word sucus, meaning "juice" or "sap".

<i>Anacampseros</i> Genus of plants

AnacampserosL. is a genus comprising about a hundred species of small perennial succulent plants native to Southern Africa, Ethiopia and Latin America. The botanical name Anacampseros is an ancient one for herbs supposed to restore lost love.

<i>Lithops viridis</i> Species of plant

Lithops viridis is a species of plant in the family Aizoaceae.

<i>Lithops salicola</i> Species of succulent

Lithops salicola is a species of perennial plant in the family Aizoaceae, often called living stones, because of its resemblance to round grey pebbles.

<i>Lithops karasmontana</i> Species of succulent

Lithops karasmontana, is a species of flowering plant in the ice plant family Aizoaceae, native to Namibia and South Africa.

<i>Lapidaria margaretae</i> Species of succulent

Lapidaria is a monotypic genus of dwarf succulent plants in the family Aizoaceae. The only species it contains is Lapidaria margaretae, also known as the Karoo rose.

<i>Dinteranthus</i> Genus of succulents

Dinteranthus is a genus of plants in the family Aizoaceae. It occurs in the arid northwestern parts of the Northern Cape Province, South Africa and the south-eastern parts of Namibia.

<span class="mw-page-title-main">Lithops amicorum</span> Subspecies of succulent

Lithops amicorum is a small succulent plant with white flowers, one of the smallest in the genus. It was named for the group of four friends who discovered it. It was collected by Desmond T. and Naureen A. Cole on 3 May 2004. After recent molecular analysis it was recombined to be a subspecies of Lithops karasmontana rather than its own species.

<span class="mw-page-title-main">Leaf window</span> Specialized leaf structure

Leaf window, also known as epidermal window, and fenestration, is a specialized leaf structure consisting of a translucent area through which light can enter the interior surfaces of the leaf where photosynthesis can occur. The translucent structure may include epidermal tissue, and in some succulent plants it consists of several cell layers of parenchyma, which may also function as water-storage tissue. It can appear as a large continuous patch, a variegated or reticulated region, or as numerous small spots. It is found in some succulent plants native to arid climates, allowing much of the plant to remain beneath the soil surface where it is protected from desiccation by winds and heat while optimizing light absorption. Many species featuring leaf windows are native to Southern Africa.

<i>Astroloba spiralis</i> Species of flowering plant

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<i>Lithops divergens</i> Species of succulent

Lithops divergens is a succulent plant species of the genus Lithops under the family Aizoaceae. It grows around the regions of Southern Africa and it able to withstand intense climatic changes due to its resilience as a succulent. The average annual rainfall for its natural environment is less than 150mm, occurring primarily in winter which is unusual for a Lithops.

<i>Lithops dinteri</i> Species of succulent

Lithops dinteri is a species of the genus Lithops of the family Aizoaceae. It is a succulent plant native to the desert climate of Southern Africa, where is receives an average yearly rainfall of 464mm. The succulent plant is named after Mortiz Kurt Dinter, a German botanist of the late 19th and early 20th century. He was a collector of exotic succulents and his collection numbered around 8,400 pressed specimens.

<i>Lithops gracilidelineata</i> Species of succulent

Lithops gracilidelineata is a species of the genus Lithops under the family Aizoaceae. The succulent plant lives in the southern region of Africa, and receives its name from the Latin words gracili and linea, combining to form the translation of "fine lined."

<i>Lithops julii</i> Species of succulent

Lithops julii is a species of succulent plant of the genus Lithops under the family Aizoaceae. It is native to Southern Africa, and was first collected by Professor Kurt Dinter, a German botanist, and named after his friend, Dr. Julius Derenberg.

<i>Lithops naureeniae</i> Species of succulent

Lithops naureeniae is a species of pebble plant (Lithops). It is classified under the family Aizoaceae. The succulent is native to Southern Africa and has the ability to withstand the desert climate in which it lives. L. naureeniae was identified in 1980 by Desmond Cole, who became involved in Lithops research in 1947, from a specimen provided to him by Bruce Bayer, curator of the Karoo Botanic Garden, having been collected by Peter V. Bruyns in Namaqualand. It is named after Cole's wife, Naureen Cole. Cole wrote:

I therefore have pleasure in dedicating it to the person who, during the last fifteen years, directly and indirectly, has contributed more to research on and knowledge of the genus Lithops than any other—my wife, Naureen

References

  1. 1 2 Loots, S. (2004). "Lithops francisci". IUCN Red List of Threatened Species . 2004: e.T46788A11077347. doi: 10.2305/IUCN.UK.2004.RLTS.T46788A11077347.en . Retrieved 12 November 2021.
  2. "Lithops francisci (Dinter & Schwantes) N.E.Br". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved June 23, 2022.
  3. 1 2 3 4 5 6 Cole, Desmond Thorne (2005). Lithops: Flowering Stones. Cactus & Co. ISBN   88-900511-7-5.
  4. Wardell-Johnson, Grant (2000). Biodiversity and Conservation on Namibia into the 21st Century. Laxenburg, Austria: IIASA. pp. 17–45.
  5. Nicholson, Sharon E. (2011). Dryland Climatology. Cambridge University Press. pp. 385–388. ISBN   978-0-521-51649-5.