Fibrous root system

A fibrous root system (sometimes also called adventitious root system) is the opposite of a tap root system. It is usually formed by thin, moderately branching roots growing from the stem.

A fibrous root system is universal in monocotyledonous plants and ferns, and is also common in dicotyledonous plants.

Most trees begin life with a taproot, but after one to a few years change to a wide-spreading fibrous root system with mainly horizontal surface roots and only a few vertical, deep anchoring roots. A typical mature tree 30–50 m tall has a root system that extends horizontally in all directions as far as the tree is tall or more, but well over 95% of the roots are in the top 50 cm depth of soil.

A few plants with fibrous root systems:

• Monocotyledons
• Pteridophyta
• white clover (Trifolium repens)
• marigold

External links and references

• Ohio State site