Sphagneticola trilobata aka Wedelia

Sphagneticola trilobata is a creeping perennial in the daisy family. Gardeners know it as wedelia or Singapore daisy. Its native range runs from Mexico through tropical South America, including Trinidad. It has spread beyond gardens in many warm regions. In the wild, it grows on damp ground and beaches. It also occurs in marshes. Its fast growth can make it hard to contain.

In gardens, it forms mats about 0.5–1 foot [0.15–0.3 metres] tall. Other accounts report heights reaching 2 feet [0.6 metres]. Long green stems root at nodes where they touch moist soil. These stems can spread into lawns and nearby beds. They may also climb through shrubs and trees. The simple leaves grow in opposite pairs. They feel rough and have a dark green, glossy surface. Most have three lobes, though some have barely any. Leaves measure about 0.08–0.33 feet [0.025–0.10 metres] long across the sources. In warm conditions, the foliage stays green year-round.

Small yellow flower heads rise above the leaves. Their daisy-like form draws bees and butterflies. North Carolina State lists summer as the flowering season. Florida accounts report flowers throughout the year in warm conditions. Full sun brings the most flowers. Plants in shade still bloom, but produce fewer heads. The fruit is brown, narrow, dry, and easy to miss. It measures less than 0.04 feet [0.013 metres] long.

This plant grows in sun or partial shade. Moist soil supports its fastest growth, while dry sites slow it. It accepts sand, loam, clay, and acidic or alkaline soil. It also tolerates flooding, salt, and some drought. Sources place it within USDA zones 8b–11 or 9a–10b. Frost kills the top growth, though roots may survive some frost. Warm weather can then bring new shoots. Tip cuttings and layering root with ease.

Past landscape uses include groundcover, erosion control, containers, and hanging baskets. It can trail over walls and cover rough ground. Yet Florida authorities class it as invasive and discourage planting. Keeping it among shrubs can demand frequent trimming. Its brittle stems limit its use under heavy foot traffic. Chewing insects and mites sometimes attack it. No major diseases are reported. Sources list no known edible uses or hazards. This does not establish safety for people or pets. Traditional remedies use the plant for coughs and chest colds; these reports do not establish medical benefit.