Marantaceae

Maranta leuconeura3

Maranta-timelapse

Marantaceae, commonly known as the arrowroot family, is a family of flowering plants found in the tropics, especially in the Americas. They are part of the order Zingiberales, which also includes such well-known plants as gingers, bananas, and heliconias. The family is significant for its economic importance in horticulture and agriculture, as well as its distinctive botanical features.

Description

Members of the Marantaceae family are predominantly herbaceous plants with rhizomes or tubers. They are characterized by their large and often striking leaves, which are usually arranged in two rows. The leaves are unique in their ability to move in response to changes in light and humidity, a phenomenon known as nyctinasty. This movement is facilitated by a specialized pulvinar joint at the base of each leaf.

The flowers of Marantaceae are typically asymmetrical and are pollinated by insects. They possess a complex structure that often involves a trigger mechanism to ensure effective pollination. The fruits are usually dry capsules or fleshy berries containing small seeds.

Ecology

Marantaceae plants are found in a variety of tropical habitats, from lowland rainforests to mountainous regions. They are particularly abundant in South America and Africa, where they contribute significantly to the understory vegetation. These plants play a crucial role in the ecosystem by providing food and shelter for various animal species. Additionally, their flowers are an important source of nectar for certain pollinators.

Economic Importance

Several species within the Marantaceae family have considerable economic value. The most well-known is Maranta arundinacea, the source of arrowroot powder, a starch extracted from the rhizomes of the plant. Arrowroot powder is used in cooking and as a natural thickening agent. Other species, such as those in the genus Calathea, are widely cultivated as ornamental plants due to their decorative leaves.

Genera

The Marantaceae family comprises several genera, including:

• Maranta – Known for the arrowroot plant.
• Calathea – Includes many popular ornamental species.
• Stromanthe – Another genus with horticulturally valuable species.
• Thalia – Contains species with striking inflorescences.

Conservation

While many Marantaceae species are common and not currently at risk, habitat destruction and overcollection have placed some species in danger. Conservation efforts are necessary to ensure the survival of these plants, particularly those that are endemic to limited areas.

See Also

• Zingiberales
• Herbaceous plant
• Pollination

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