Barthlottia

Last updated

Barthlottia
Barthlottia madagascariensis (Scrophulariaceae) at type locality SE Madagascar - Foto Charles Rakotavao (Tropicos(r)), W. Barthlott, Lotus.Salvinia.de.jpg
Barthlottia madagascariensis: Inflorescence and solitary flower at the type locality in Madagascar - Fotos Charles Rakotovao, Tropicos ®
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Scrophulariaceae
Tribe: Limoselleae
Genus: Barthlottia
Eb.Fisch.
Species:
B. madagascariensis
Binomial name
Barthlottia madagascariensis
Eb.Fisch.

Barthlottia madagascariensis is the only species in the genus Barthlottia of flowering plants in the family Scrophulariaceae. The large shrub with conspicuous purple flowers is native to a very restricted area in southeast Madagascar and was described in 1996.

Contents

Description

Shrubs are up to 3 m. The elliptic-lanceolate opposite leaves are up to 15 cm long. Terminal inflorescences have up to 15 conspicuous 5-lobed bell shaped flowers, which are up to 4 cm long and purplish-red. [1]

Habitat and history

Madagascar is rich in species, [2] which only inhabit this island (endemics). Barthlottia is such an endemic species and only occurs in a region of about 30 x 30 km in SW Madagascar, about 45 km NW of Tolagnaro (Ft. Dauphin) on Inselbergs and rock outcrops (Fischer & Theisen 2000) on the Anosy mountains. The sites are mostly located within the Andohahela National Park (Unesco World Heritage).

The restricted and remote habitat is probably the reason why till today only less than six collections of Barthlottia are known. [2] [3] The rather conspicuous plant was collected for the first time in 1947 by the French botanist Jean-Henri Humbert, but remained unrecognized in the herbarium of the Musée d´Histoire Naturelle in Paris. Later in 1996 Barthlottia was finally described by the German botanist Eberhard Fischer as a new genus and species. [3] It was named in honor of the botanist and biomimetics scientist Wilhelm Barthlott, who had been interested in the Vegetation of the Inselbergs of Madagascar. [4] E. Fischer discovered over the last decades many new species, under them the world smallest waterlily ( Nymphaea thermarum ).

Taxonomy

Barthlottia belongs to the tribe Limoselleae (former Manuleae) within the foxglove family Scrophulariaceae. Molecular data [5] [6] confirm the relatively isolated systematic position. Barthlottia seems to have no closer relatives in Madagascar and resembles distantly the Namibian Manuelopsis dinteri .

Related Research Articles

Scrophulariaceae The figwort family of flowering plants

The Scrophulariaceae are a family of flowering plants, commonly known as the figwort family. The plants are annual and perennial herbs, as well as one genus of shrubs. Flowers have bilateral (zygomorphic) or rarely radial (actinomorphic) symmetry. The Scrophulariaceae have a cosmopolitan distribution, with the majority found in temperate areas, including tropical mountains. The family name is based on the name of the included genus Scrophularia L.

Pachypodium habitats consist of isolated, specialized, micro–environmental niches, generally xeric, rocky, frost-free areas within parts of western Madagascar and southern Africa. Pachypodium species are often indifferent to the regional ecological, biotic zone of vegetation, a fact which explains some of Pachypodium morphology and architecture. The large scale vegetation zones are in some cases irrelevant to the micro-environments of Pachypodium, in the sense that the xeric niches may be embedded in larger mesic biomes.

Madagascar spiny forests

The Madagascar spiny forests is an ecoregion in the southwest of Madagascar. The vegetation type is found on poor substrates with low, erratic winter rainfall. The ecoregion contains an outstanding proportion of endemic plant species and is listed as one of the 200 most important ecological regions in the world; one of the Global 200.

Isalo National Park

Isalo National Park is a National Park in the Ihorombe Region of Madagascar, in the southwestern corner of the Province of Fianarantsoa. The closest town is Ranohira, and the closest cities are Toliara and Ihosy. It is a sandstone landscape that has been dissected by wind and water erosion into rocky outcrops, plateaus, extensive plains and up to 200 m deep canyons. There are permanent rivers and streams as well as many seasonal watercourses. Elevation varies between 510 and 1268 m.

Genlisea margaretae is a carnivorous species in the genus Genlisea native to areas of Madagascar, Tanzania, and Zambia. It has pale bundles of root-like organs up to about 20 cm long under ground that attract, trap, and digest protozoans. These organs are subterranean leaves, which lack chlorophyll. It had been known to possess the smallest known genome of any flowering plant as of 2006, but was later surpassed by the related species Genlisea tuberosa.

Linderniaceae

Linderniaceae is a family of flowering plants in the order Lamiales, which consists of about 25 genera and 265 species occurring worldwide. Vandellia micrantha is eaten in Laos, but tastes bitter. Best known are the wishbone flowers Torenia fournieri and Torenia thouarsii, which are used as bedding plants especially in the tropics. Micranthemum is sold as an aquarium plant when it is called 'baby tears'.

Wilhelm Barthlott

Wilhelm Barthlott is a German botanist and biomimetic materials scientist. His official botanical author citation is “Barthlott”.

Pentachlaena is a genus of flowering plant belonging to the Sarcolaenaceae family, endemic to Madagascar. It was first scientifically described in 1920.

Flora of Madagascar Plants endemic to Madagascar

The flora of Madagascar consists of more than 12,000 species of plants, as well as a poorly known number of fungi and algae. Around 83% of Madagascar's vascular plants are found only on the island. These endemics include five plant families, 85% of the over 900 orchid species, around 200 species of palms, and such emblematic species as the traveller's tree, six species of baobab and the Madagascar periwinkle. The high degree of endemism is due to Madagascar's long isolation following its separation from the African and Indian landmasses in the Mesozoic, 150–160 and 84–91 million years ago, respectively. However, few plant lineages remain from the ancient Gondwanan flora; most extant plant groups immigrated via across-ocean dispersal well after continental break-up.

<i>Decanema</i> Genus of plants

Decanema is a small genus in the dogbane family first described as a genus in 1838. The group is endemic to Madagascar.

  1. Decanema bojerianumDecne. - Madagascar
  2. Decanema luteifluensJum. & H.Perrier - Madagascar

Mediusella bernieri is a plant in the family Sarcolaenaceae. It is endemic to Madagascar.

<i>Xerochlamys</i>

Xerochlamys is a genus of trees and shrubs in the family Sarcolaenaceae. The species are all endemic to Madagascar.

Xerochlamys itremoensis is a shrub in the family Sarcolaenaceae. It is endemic to Madagascar.

Rhodolaena is a genus of trees and shrubs in the family Sarcolaenaceae. The species are all endemic to Madagascar. The monophyly of the genus is unresolved.

Rhodolaena leroyana is a plant in the family Sarcolaenaceae. It is endemic to Madagascar. The specific epithet is for the botanist Jean-François Leroy.

Schizolaena gereaui is a plant in the family Sarcolaenaceae. It is endemic to Madagascar. The specific epithet is for the botanist Roy Emile Gereau.

Eremolaena humblotiana is a plant in the family Sarcolaenaceae. The species is endemic to Madagascar. It is named for the French naturalist Léon Humblot.

Schizolaena raymondii is a tree in the family Sarcolaenaceae. It is endemic to Madagascar. It is named for the botanist Raymond Rabevohitra.

<i>Megistostegium</i>

Megistostegium is a genus of trees and shrubs in the family Malvaceae. The species are all endemic to Madagascar. The genus is threatened by livestock grazing, invasive plants and threats to pollinators.

Megistostegium perrieri is a plant in the family Malvaceae. It is endemic to Madagascar.

References

  1. Fischer, E. (1996). Barthlottia, a new monotypic genus of Scrophulariaceae-Manuleae from Madagascar. Bull. Mus. Natl. Hist. Nat., B, Adansonia 18: 351–356
  2. 1 2 Goodmann, S. M., Benstead, J. O. (2003). Natural History of Madagascar – University of Chicago Press
  3. 1 2 Madagascar Catalogue (2018). Catalogue of the Plants of Madagascar. Missouri Botanical Garden, St. Louis, U.S.A. & Antananarivo, Madagascar Accessed: February, 2018
  4. Fischer, E., Theisen, I. (2000). Vegetation of Malagasy Inselbergs – in: Porembski S., Barthlott, W. (Eds): Inselbergs, Biotic Diversity of Isolated Rock outcrops – Springer Publishers, Heidelberg – New York
  5. Schäferhoff B., Fleischmann, A, Fischer, E., Albach, D.C., Borsch, T., Heubl, G, Müller, K.F. (2010). Towards resolving Lamiales relationships: insights from rapidly evolving chloroplast sequences. BMC Evolutionary Biology 10, 352–362
  6. Kornhall, P., Bremer, B. (2004). New circumscription of the tribe Limoselleae (Scrophulariaceae) that includes the taxa of the tribe Manuleeae. Bot. J. Linn. Soc. 146, 453–467