線蕨屬多年生草本，原產東亞亞熱帶至溫帶氣候區。岩生或地生，根莖匍匐，被有褐色鱗片。葉柄有翅，倒披針形葉，寬約2~4cm，長20~45cm，葉緣略呈波浪狀。側脈顯著，孢子囊群在中肋兩側長線形，線蕨之名由此而來。葉片或呈二型，孢子葉較修長，營養葉較寬短。

A perennial herb in the genus Colysis, native to East Asia subtropical to temperate climate zones. Terrestrial or lithophytic, rhizomes creeping covered with brown scales. Petiole winged, frond oblanceolate, about 2~4cm wide, 20~45cm long, and margins slightly undulated. Lateral veins prominent, sori borne on both sides along the midrib, long and linear in shape which the Chinese common name comes from. Fronds two-typed, fertile fronds slender, sterile fronds wider and shorter.

半日照潮濕環境生長良好，種植於地面。如需附生於磚牆石壁上，則要加強噴水噴霧提供高濕度以利初期根莖附著生長。介質使用壤土、培養土或水苔。介質略乾就澆水，施用稀釋的液體觀葉植物用肥料。繁殖使用播孢子與分株法。

The moist-loving plant thrives in humid and partial-sun conditions, planted on the ground. If cultivated on brick and stone walls, frequent spraying and misting is required to facilitate the growth of the initial rhizome attachment. Use loam, culture soil or sphagnum moss as the medium and water once the medium appears dry. Apply diluted liquid fertilizers specialized for foliage plants. Propagation by spore and division.

葉色翠綠光亮，成叢盆栽可欣賞鮮嫩綠意。作為遮蔭環境的地被植物使用，具有自然野趣。常自然生長於靠近郊山原生環境的陰濕場域中，在石壁、牆角、樹幹上時常可見。

The plant is grown for the bright and green fronds and can be planted in groups to display the fresh greenery, or as a ground cover in a shaded environment to add a natural and wild touch. It grows naturally in the shady and humid fields near the native habitats in suburban mountains, and is often seen on stone walls, wall corners, and tree trunks.