Hydrocotyle sibthorpioides, commonly known as Asian pennywort or marsh pennywort, is a small, creeping perennial plant native to Asia. It is often grown as an aquatic or semi-aquatic plant and is popular for its attractive foliage and ground-covering habit. Here is a detailed description and care guide for Hydrocotyle sibthorpioides:

Description:

Foliage: The leaves of Hydrocotyle sibthorpioides are small, round, and bright green in color. They are deeply lobed and have scalloped edges, resembling miniature umbrellas. The leaves are arranged in a dense, low-growing rosette pattern.
Growth habit: This plant forms dense mats or carpets of foliage, spreading through stolons that root at the nodes and rapidly fill in the surrounding area.
Flowers: Hydrocotyle sibthorpioides produces small, inconspicuous white or pale pink flowers that are held above the foliage on thin stalks. The flowers may appear in clusters during the summer months.
Care Guide:

Light: Hydrocotyle sibthorpioides thrives in partial shade to full sun. In indoor aquariums, it can tolerate moderate lighting conditions.
Water: This plant requires consistently moist to wet conditions, making it ideal for growing in ponds, water gardens, or containers with water features. It can also be grown as a bog plant in consistently moist soil.
Temperature: Hydrocotyle sibthorpioides is adaptable to a wide range of temperatures. It can tolerate both cool and warm conditions but prefers temperatures between 68°F (20°C) and 86°F (30°C).
Soil: It prefers rich, loamy soil with good moisture retention. In aquatic settings, it can be planted directly in the substrate or placed in containers with aquatic soil.
Fertilizer: Fertilization is not typically necessary for Hydrocotyle sibthorpioides, as it can obtain nutrients from the water or soil. However, if grown in a container or poor soil, a balanced liquid fertilizer can be applied sparingly during the growing season.
Maintenance: Regular trimming is required to control the growth and maintain the desired appearance. Prune any excess growth to prevent it from spreading excessively. It is a good idea to remove any dead or decaying leaves to maintain the plant's health.
Propagation: This plant can be propagated by division, where the rooted stolons can be separated from the parent plant and replanted in new locations.
Overall, Hydrocotyle sibthorpioides is a versatile and low-maintenance plant that adds a lush and vibrant touch to aquatic environments. Whether grown in ponds, water gardens, or indoor aquariums, it provides an attractive ground cover and helps create a natural and serene atmosphere.