Hafan

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Croeso i:

Wicirywogaeth

Y cyfeirlyfr digidol rhydd ac am ddim y gall bawb ei olygu.

Mae'n cynnwys Animalia, Plantae, Fungi, Bacteria, Archaea, Protista a phopeth byw!

Ar hyn o bryd mae gennym 614,434 o erthyglau.

Mae Wicirywogaeth yn rhydd o berchnogaeth hawlfraint, fel bywyd ei hun!

Fforio'r tacson
Feirws (dosbarthiad dal yn ansicr)

Archwiliwch Wicirywogaeth

  • Cymorth – Gwybodaeth fanwl ar sut i olygu.
  • Tacsonomeg – Gwybodaeth ar Ddosbarthiad Linnaeans.
  • Tafarn – Trafodwch y prosiect.
  • Gwnaed ac ar waith – Cyfeiriadau manwl i gwmpas y gwaith a chynlluniau a thargedi
  • FAQs – Trafodaethau a phryderon
  • Canllawiau – Argymhellion ble y medrwch uwchlwytho lluniau
  • PR Wicirywogaeth – Sut i ledaenu a 'marchnata' Wicirywogaeth i'r byd mawr crwn.


Cydweithio gyda ZooKeys

Zookeys logo.svg
PhytoKeys Logo.svg

Cyhoeddwyd y byddwn yn cydweithio gyda ZooKeys. Mae PhytoKeys hefyd wedi ymuno gyda'r prosiect ers Tachwedd 2010. Mae lluniau a delweddau ZooKeys a PhytoKeys yn cael eu huwchlwytho i Gomin Wicimedia a'u defnyddio ar Wicirywogaeth.



Awduron o nod

Adriana Hoffmann Jacoby
Born 1940. Standard IPNI form: A.E.Hoffm.

As a Chilean botanist and environmentalist, Adriana Hoffmann Jacoby has authored over a dozen books on the flora of Chile and has identified and classified more than 100 new species of cacti. She was Chile's Environment Minister in 2000 and 2001. She has advocated for the sustainable management and protection of Chilean forests, leading opposition to illegal logging in her role as coordinator of Defensores del Bosque Chileno (Defenders of the Chilean Forest) since 1992.

Hoffmann was recognized by the United Nations in 1997 as one of the 25 leading environmentalists of the decade for her efforts to protect Chile's forests. In 1999 she won the National Environmental Prize in the category of Environmental Education, awarded by Comisión Nacional del Medio Ambiente (CONAMA). For her research into Chilean flora and her work in environmental education, Hoffmann received the Luis Oyarzún Award from the Austral University of Chile in 2003. She received a Fellow Award from the Cactus and Succulent Society of America in 2009.

Hoffmann has also served on the judging panel for the United Nations Environment Programme's Sasakawa Prize.

See also: Distinguished authors of previous months.

Species of the month

Cocoa Tree

Theobroma cacao

Theobroma cacao

Some facts on this tree:

Tree height: 4-8 meters.

Flower: 1–2 cm. in diameter, with pink calyx.

Fruit, called also Pod: Up to 30cm long, yellow, brown and even purple in colour, usually with 10 ribs. Each pod contains 20 to 60 beans up to 3 cm long, which are usually arranged in five rows surrounded by a sugary pulp.

Range: Native to the deep tropical region of the Americas. Cultivated also in Africa and Asia between ±15° latitude.

Life-span: Up to 100 years, but cultivated trees are considered economically productive for only about 60 years.

First described: By Swedish naturalist Carolus Linnaeus in 1753.


Take some Theobroma cacao seeds, grind them to a smooth butter, add a sweetener and other flavorings, such as vanilla, and what do you get? You probably guessed: it's the beloved chocolate. This tree grows all over the tropics, especially in Western Africa where 70% of the cocoa world production is made in countries such as the Ivory Coast and Ghana. Cacao trees are quite picky about their environment. They require moist, nutrient-rich, well-drained soil and partial sunlight. The plant is also sensitive to pests and scientists are crossing West African cocoa trees with their wild South American ancestors to create disease-resistant trees, which will lead to fewer chemicals. Currently, 4 million metric tons of beans worth more than $4 billion are produced each year. The meaning of the scientific name is 'food of the gods' in Greek. Mayan and Aztec nobles drank their cocoa beans ground and brewed with chillies and in the Aztec empire the beans were used as money. It arrived in Spain in the 16th century, and gradually grew in popularity especially with the ladies of the Spanish court. The cacao tree is a member of the Malvaceae or mallow family which contains over 200 genera with close to 2300 species including the kapok, mallow, cola and hibiscus.

See also: Species of previous months

Wicirywogaeth mewn ieithoedd eraill

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