Fibres are usually obtained from the members of Malvaceae family. Malvaceae is a family of flowering plants commonly known as the mallow family. The family includes around 244 genera and over 4,000 species, making it one of the larger plant families. Some of the common plants from which fibres are obtained are:

1. Cotton: Cotton is the most important fibre crop in the world. It is obtained from the seed hairs of the cotton plant (Gossypium spp.), which belongs to the Malvaceae family. Cotton fibres are used in the production of textiles, clothing, and various other products.

2. Jute: Jute is a long, soft, shiny vegetable fibre that can be spun into coarse, strong threads. It is obtained from the stem of the jute plant (Corchorus spp.), which belongs to the Malvaceae family. Jute fibres are used in the production of burlap, gunny bags, and other coarse fabrics.

3. Kenaf: Kenaf is a plant from the hibiscus family (Hibiscus cannabinus) that is grown for its fibres. The fibres are obtained from the bark of the plant and are used in the production of paper, textiles, and other products.

4. Kapok: Kapok is a soft, silky fibre that comes from the seed pods of the kapok tree (Ceiba pentandra), which belongs to the Malvaceae family. Kapok fibres are used in the production of pillows, mattresses, and life jackets.

In conclusion, the members of the Malvaceae family are the primary source of fibres used in the production of textiles, clothing, and various other products. Cotton, jute, kenaf, and kapok are some of the common plants from which fibres are obtained.