Pachycaul

Last updated
Fouquieria columnaris Boojum Tree.jpg
Fouquieria columnaris

Pachycauls are plants with a disproportionately thick trunk for their height, and few branches. [1] In contrast, trees with thin twigs such as Oak (Quercus), Maple (Acer) and Eucalyptus are called leptocauls while those with moderately thick twigs like Plumeria are called mesocauls. Pachycauly can be the product of exceptional primary growth (as with palms and cycads) or disproportionate secondary growth as with the Baobabs ( Adansonia ). The word is derived from the Greek pachy- meaning thick or stout, and Latin caulis meaning the stem. [2] All of the tree (and treelike) species of cactus are pachycauls, as are most palms, Cycads and pandans. The most extreme pachycauls are the floodplains, or riverbottom variety of the African Palmyra (Borassus aethiopum) with primary growth up to seven feet (2.1 meters) in thickness, [3] [4] [5] and the Coquito Palm (Jubaea chilensis) with primary growth up to six feet (1.8 meters) thick. [6] [7] [8] The most pachycaulous cycad is Cycas thouarsii at up to five feet (150 centimeters) in diameter. [9] The tallest pachycaul is the Andean Wax Palm (Ceroxylon quindiuense) at up to 220 feet (67 meters). [10] and about 16 inches (41 cm) in diameter. The most pachycaulous cactus is the Bisnaga (Echinocactus platyacanthus) with primary growth up to 4 ft 4 in (1.32 meters) in diameter. [11] The largest caudex type pachycaul is the African Baobab (Adansonia digitata). One called the Glencoe Baobab at Hoedspruit, South Africa has a basal diameter (not girth) of 52 ft 2 in (15.90 meters). [12] This tree suffered a severe trauma and is dying.

Examples occur in the genera [13]

See also

Related Research Articles

<span class="mw-page-title-main">Sago</span> Starch extracted from tropical palm stems

Sago is a starch extracted from the pith, or spongy core tissue, of various tropical palm stems, especially those of Metroxylon sagu. It is a major staple food for the lowland peoples of New Guinea and the Maluku Islands, where it is called saksak, rabia and sagu. The largest supply of sago comes from Southeast Asia, particularly Indonesia and Malaysia. Large quantities of sago are sent to Europe and North America for cooking purposes. It is traditionally cooked and eaten in various forms, such as rolled into balls, mixed with boiling water to form a glue-like paste (papeda), or as a pancake.

<i>Adansonia</i> Genus of plants known as baobab

Adansonia is a genus made up of eight species of medium-to-large deciduous trees known as baobabs. They are placed in the Malvaceae family, subfamily Bombacoideae. They are native to Madagascar, mainland Africa, and Australia. The trees have also been introduced to other regions such as Asia. The generic name honours Michel Adanson, the French naturalist and explorer who described Adansonia digitata. The baobab is also known as the "upside down tree", a name that originates from several myths. They are among the most long-lived of vascular plants and have large flowers that are reproductive for a maximum of 15 hours. The flowers open around dusk, opening so quickly that movement can be detected by the naked eye, and are faded by the next morning. The fruits are large, oval to round and berry-like and hold kidney-shaped seeds in a dry, pulpy matrix.

<i>Adansonia gregorii</i> Species of tree

Adansonia gregorii, commonly known as the boab and also known by a number of other names, is a tree in the family Malvaceae, endemic to the northern regions of Western Australia and the Northern Territory of Australia.

<i>Phytolacca dioica</i> Species of tree

Phytolacca dioica, commonly known as ombú in Spanish and umbu in Portuguese, is a massive evergreen tree in the Pokeweed Family (Phytolaccaceae) native to the Pampas of South America. As its specific epithet suggests, it is dioecious, with male and female flowers on separate plants. The flowers are pollinated by the butterfly Doxocopa laurentia. It has an umbrella-like canopy that spreads to a diameter of 12 to 15 meters and can attain a height of 12 to 18 meters. This upper growth springs up from a tuberous caudex which, according to Everett "may occupy a circle sixty feet [18 meters] in diameter". One tree of such a size is mentioned by Anglo-Argentine writer William Henry Hudson in his autobiography " Far Away and Long Ago", which was fifty feet girth above the caudex. Because it is derived from herbaceous ancestors, its trunk consists of anomalous secondary thickening rather than true wood. As a result, the ombú grows fast but its wood is soft and spongy enough to be cut with a knife. These properties have led it to be used in the art of bonsai, as it is easily manipulated to create the desired effect. Since the sap is poisonous, the ombú is not grazed by cattle and is immune to locusts and other pests. For similar reasons, the leaves are sometimes used as a laxative or purgative. It is a symbol of Uruguay, Rio Grande do Sul and Argentina, and of gaucho culture, as its canopy is quite distinguishable from afar and provides comfort and shelter from sun and rain.

<i>Adansonia digitata</i> Species of plant

Adansonia digitata, the African baobab, is the most widespread tree species of the genus Adansonia, the baobabs, and is native to the African continent and the southern Arabian Peninsula. These are long-lived pachycauls; radiocarbon dating has shown some individuals to be over 2,000 years old. They are typically found in dry, hot savannas of sub-Saharan Africa, where they dominate the landscape and reveal the presence of a watercourse from afar. They have traditionally been valued as sources of food, water, health remedies or places of shelter and are a key food source for many animals. They are steeped in legend and superstition. In recent years, many of the largest, oldest trees have died, for unknown reasons. Common names for the baobab include monkey-bread tree, upside-down tree, and cream of tartar tree.

<i>Phytelephas</i> Genus of palms

Phytelephas is a genus containing six known species of dioecious palms, occurring from southern Panama along the Andes to Ecuador, Bolivia, Colombia, northwestern Brazil, and Peru. They are commonly known as ivory palms, ivory-nut palms or tagua palms ; the scientific name Phytelephas means "plant ivory" or more literally, "plant elephant". This and the first two of the common names refer to the very hard white endosperm of their seeds, which resembles elephant ivory.

<i>Adansonia madagascariensis</i> Species of flowering plant

Adansonia madagascariensis or Madagascar baobab is a small to large deciduous tree in the family Malvaceae. It is one of six species of baobab endemic to Madagascar, where it occurs in the Madagascar dry deciduous forests.

<i>Borassus aethiopum</i> Species of palm

Borassus aethiopum is a species of Borassus palm from Africa. In English, it is variously referred to as African fan palm, African palmyra palm, deleb palm, ron palm, toddy palm, black rhun palm, rônier palm. It is widespread across much of tropical Africa from Senegal to Ethiopia and south to northern South Africa, though it is largely absent from the forested areas of Central Africa and desert regions such as the Sahara and Namib. This palm also grows in northwest Madagascar and the Comoros.

<i>Adansonia rubrostipa</i> Species of flowering plant

Adansonia rubrostipa, commonly known as fony baobab, is a deciduous tree in the Malvaceae family. Of eight species of baobab currently recognized, six are indigenous to Madagascar, including fony baobab. It is endemic to western Madagascar, found in Baie de Baly National Park, south. It is associated with well-drained soils and is found in dry and spiny forests. It occurs in the following protected areas: Amoron'i Onilahy, Baie de Baly, Menabe Antimena, Mikea, Namoroka, Ranobe PK 32, Tsimanampesotse, Tsimembo Manambolomaty, Tsinjoriake.

<i>Adansonia grandidieri</i> Species of tree from Madagascar

Adansonia grandidieri is the biggest and most famous of Madagascar's six species of baobabs. It is sometimes known as Grandidier's baobab or the giant baobab. In French it is called Baobab malgache. The local name is renala or reniala. This tree is endemic to the island of Madagascar, where it is an endangered species threatened by the encroachment of agricultural land. This is the tree found at the Avenue of the Baobabs.

<i>Adansonia perrieri</i> Species of flowering plant

Adansonia perrieri, or Perrier's baobab, is a critically endangered species of deciduous tree, in the genus Adansonia. This species is endemic to northern Madagascar. It has been documented in only 10 locations, including the Ankarana, Ampasindava, Loky Manambato and Montagne d'Ambre protected areas. Most populations, however, are outside of protected areas. Each location has few individuals. With an estimated population of fewer than 250 mature individuals and ongoing habitat decline due to fire and cutting for charcoal and timber or clearing for mining, this species has been assessed by IUCN as Critically Endangered. There are three species of baobab found in northern Madagascar, all sharing the common name "bozy".

<span class="mw-page-title-main">Caudex</span> Biological structure in a plant stem

A caudex of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.

<i>Adansonia za</i> Species of flowering plant

Adansonia za is a species of baobab in the genus Adansonia of the family Malvaceae. It was originally named in French as anadzahé. Common names in Malagasy include bojy, boringy, bozy, bozybe, ringy, and za, the last of which gives the plant its specific epithet. Eight Adansonia species are recognized, with six endemic to Madagascar. Adansonia za is the most widespread of the Madagascar endemics.

<i>Corypha utan</i> Species of palm

Corypha utan, the cabbage palm, buri palm or gebang palm, is a species of palm native to Asia and Oceania.

<span class="mw-page-title-main">Sunland Baobab</span> Baobab tree in South Africa

Sunland Baobab is a well-known enormous baobab in South Africa. The tree is located on Sunland Farm, near Modjadjiskloof, Limpopo Province. In one study the tree was carbon-dated and found to be an estimated 1,060 years old, plus or minus 75 years. Results of other studies have however suggested much higher ages. The tree used to bloom profusely in spring, at some stage providing a refuge to two pairs of owls, and other bird species. Most of the tree died in 2016 and 2017.

<span class="mw-page-title-main">Naya Qila</span> Historic site in India

Naya Qila is an extended portion of Golkonda Fort in Hyderabad, India. It was built in 1656 by Sultan Abdullah Qutb Shah as further defence for the Mughal armies. This integral part of the Golkonda fort contains many historic structures. There are strange figures and animals worked out of stone and stucco on the walls of the outer fort facing the Naya Qila. It is one of the least explored heritage sites of India, partly because it has become part of a golf course, which makes access for visitors complicated.

<span class="mw-page-title-main">Tree girth measurement</span>

Tree girth is a measurement of the circumference of tree trunk. It is one of the most ancient, quickest, and simplest of foresters' measures of size and records of growth of living and standing trees. The methods and equipment have been standardized differently in different countries. A popular use of this measurement is to compare outstanding individual trees from different locations or of different species.

References

  1. Gupta, I. C.; S. K. Gupta (1992). Concepts' Dictionary Of Agricultural Sciences. Concept Publishing Company. p. 348. ISBN   978-81-7022-301-6.
  2. Stearn, W.T. (1992). Botanical Latin: History, grammar, syntax, terminology and vocabulary, Fourth edition. David and Charles.
  3. Von Mueller, Ferdinand (1881). Select Extra-tropical Plants. Sydney: Government Printer. p. 50.
  4. Kunkel, Reinhard (1982). Elephants. New York: Harry N. Abrams Inc. pp. Color Plate on pages 100–101. Includes two adult bull Savanna Elephants for size comparison.
  5. Carder, Dr. Al (2005). Giant Trees of Western America and the World. Madeira Park, British Columbia: Harbour Pub. Co. Ltd. p. 130.
  6. anonymous (January 1957). "<not recorded>". Principes. 1 (2): 57.
  7. Caradine, Chris (November 1998). "A Day at Ocoa". The Palm Journal. [no volumes] (143): 20 with photo.
  8. Riverside (California) Sunday Press Enterprise (September 6, 1964) page 39 Excelent photo with three people for size comparison.
  9. Earle, Christopher. "Gymnosperm Database - Cycadales" . Retrieved November 24, 2021.
  10. Corner, Prof. E.J.H. (1966). Natural History of Palms. Berkeley, Calif.: Univ. Calif. Press. p. 289.
  11. Britton, Nathan L.; Rose, Joseph N. (1963). The Cactaceae - Volume 3 (reprint ed.). New York: Dover Pubs. Inc. p. 170.
  12. Esterhuyse, Neels; et al. (2001). Remarkable Trees of South Africa. Pretoria: Briza Pubs. pp. 6 (table) and 156 & 159.
  13. Wickens, G. E.; Pat Lowe (2008). The Baobabs: Pachycauls of Africa, Madagascar and Australia. Springer. pp. 139–140. ISBN   978-1-4020-6430-2.