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Tradescantia

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Tradescantia is a large genus of herbaceous perennial wildflowers. It belongs to the family Commelinaceae. This group contains approximately 85 different species. These plants are native to the Americas. Their range stretches from southern Canada to northern Argentina. They also grow in the West Indies.

Tradescantia greece
Tradescantia greece

Many species grow in wooded areas or open fields. Some grow alone, while others grow in large clumps. These plants are important to scientists. They help researchers study cytogenetics. This is the study of how chromosomes change during evolution. They also act as bioindicators. This means they help detect environmental mutagens in the world.

Tradescantia fluminensis3 ies
Tradescantia fluminensis3 ies

The physical structure of Tradescantia varies by species. Some are climbing plants that grow upward. Other species are trailing plants that grow along the ground. Their stems are often succulent or semi-succulent. This means the stems are thick and hold moisture. The leaves are typically long and thin. They can be blade-like or lanceolate in shape. The flowers come in colors like white, pink, purple, or blue. Most flowers have three petals and six yellow anthers. An anther is the part of the flower that holds pollen. Occasionally, a rare flower might have four petals and eight anthers.

Four Petals
Four Petals

Many species have a clear, mucilaginous sap. This sap is thick and slippery. Some flowers are called dayflowers. They open in the morning and close by the evening.

IMG 5708-Tradescantia brevifolia
IMG 5708-Tradescantia brevifolia

The name Tradescantia has a long history. The scientist Carl Linnaeus chose this name. He wanted to honor two English naturalists. They were John Tradescant the Elder and John Tradescant the Younger. The younger Tradescant visited the Virginia colony in 1637. He helped bring many new plants to English gardens. One specific plant, Tradescantia virginiana, reached England in 1629. Because of this, these plants were introduced to Europe in the 17th century. Today, they are grown globally. Some species have even become naturalized in Asia, Africa, and Australia.

Common names for these plants change depending on the region. The name "inchplant" might describe their fast growth. It could also refer to leaves that sit one inch apart on the stem. The name "spiderwort" comes from the sap. When a stem is cut, the sap dries into web-like threads. Some people use the name "dayflower." This refers to the short life of the bloom. Another name, "wandering Jew," is considered controversial. It comes from a Christian myth. People now use alternative names like "wandering dude" or "wandering willie." In Spanish, they are called flor de Santa Lucía. This honors Saint Lucy, the patron saint of sight. This name relates to using the plant juice as eye drops.

Starr 080607-7174 Tradescantia spathacea
Starr 080607-7174 Tradescantia spathacea

Scientists have organized Tradescantia into different groups over time. In 1980, a researcher named Hunt proposed a classification. He divided 60 species into eight sections. In 1986, Hunt revised this. He added several small genera as sections. This created a total of twelve sections and 68 species. A more recent study was done by Pellegrini in 2017. This study used morphological research to create a new system. It divided the genus into five subgenera. As of December 2023, the Royal Botanic Gardens, Kew recognizes 86 species. These include subgenera like Austrotradescantia, Campelia, Mandonia, Setcreasea, and Tradescantia.

Starr 080607-7174 Tradescantia spathacea
Starr 080607-7174 Tradescantia spathacea

People use Tradescantia for many different reasons. Many people grow them as ornamental plants. Temperate species are used as hardy garden perennials. Tropical species are often used as houseplants. Species like Tradescantia zebrina are popular for their foliage. These leaves often have colorful patterns. You might see silver, purple, green, pink, or gold. However, some species can become problems. Tradescantia fluminensis is an invasive weed in Australia and New Zealand. It can also dominate forest floors in the southern United States. Some species can even be pests to cultivated crops.

IMG 5708-Tradescantia brevifolia
IMG 5708-Tradescantia brevifolia

It is important to be careful when growing these near animals. Some members of the genus can be toxic to pets. Specifically, cats and dogs may have allergic reactions. This usually causes red, itchy skin. Notable examples include Tradescantia albiflora and Tradescantia spathacea. Even though they are beautiful, owners should watch their pets. In nature, these plants play a role in many ecosystems. They grow in diverse habitats from temperate to tropical zones. This makes them a very successful group of plants across the planet.

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🖼️ Images & Media (5)
Four Petals.tif
File:Tradescantia fluminensis3 ies.jpg
Tradescantia fluminensis3 ies.jpg
File:Starr 080607-7174 Tradescantia spathacea.jpg
Starr 080607-7174 Tradescantia spathacea.jpg
File:IMG 5708-Tradescantia brevifolia.jpg
IMG 5708-Tradescantia brevifolia.jpg
File:Tradescantia_greece.jpg
Tradescantia_greece.jpg
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