Pteris

Pteris vittata

Pteris hillebrandii (5806384258)

半邊羽裂鳳尾蕨 Pteris semipinnata 20220619183351 02

Pteris is a genus of ferns in the family Pteridaceae, which is part of the order Polypodiales. The genus is characterized by its diverse species, which are found in various habitats around the world, including tropical and subtropical regions. Pteris ferns are known for their unique frond structures, which can vary significantly among species, from simple and undivided to complex and highly divided leaves.

Description

Pteris species exhibit a wide range of forms and sizes. Their fronds can be either evergreen or deciduous, depending on the species and the environmental conditions. The leaves are typically compound, with a central rachis supporting variously arranged leaflets or pinnae. Some species have fronds that are divided into two or more segments, creating a feather-like appearance. The sori, or spore-producing structures, are found on the underside of the fronds and are often covered by a thin, membranous structure called an indusium.

Habitat and Distribution

Pteris ferns are adaptable and can be found in a variety of habitats, including forests, mountainous areas, and even urban environments where they might grow on walls or in cracks. They have a cosmopolitan distribution, with species occurring in tropical, subtropical, and, to a lesser extent, temperate regions worldwide.

Cultivation and Uses

Some species of Pteris are cultivated for their ornamental value, appreciated for their delicate fronds and graceful appearance. They are used in gardens and as houseplants. Pteris ferns prefer moist, well-drained soil and can thrive in partial to full shade, making them suitable for indoor cultivation or for shaded areas in gardens.

Conservation

While many species of Pteris are common and not considered at risk, some are rare and face threats from habitat destruction and overcollection. Conservation efforts are necessary to protect these vulnerable species and their natural habitats.

Selected Species

• Pteris vittata – Also known as the brake fern, it is notable for its ability to absorb arsenic from contaminated soil, making it of interest for phytoremediation projects.
• Pteris cretica – Known as the Cretan brake or ribbon fern, it is a popular ornamental species with several cultivars.

See Also

• Ferns
• Pteridaceae
• Polypodiales
• Phytoremediation