Wedelia is a mat-forming, perennial herb, also known as creeping oxeye or Singapore daisy, and is scientifically classified as Sphagneticola trilobata. It's characterized by its creeping stems, bright yellow daisy-like flowers, and three-lobed leaves. Wedelia is known for its rapid growth and dense ground cover, making it a good choice for suppressing weeds and controlling soil erosion. 

Here's a more detailed description:

Growth Habit:

Wedelia is a vigorous, creeping herb that forms a dense mat. Its stems root at the nodes, allowing it to spread horizontally and form a dense ground cover. 

Leaves:

The leaves are fleshy, hairy, and typically 4-9 cm long and 2-5 cm wide. They are dark green on top and lighter green on the underside. The leaves have irregularly toothed or serrated margins and often have pairs of lateral lobes. 

Flowers:

Wedelia produces bright yellow, daisy-like flowers. The flowers are solitary and borne on long stems, forming heads with 8-13 florets. The outer florets have petal-like leaves, while the inner florets are smaller and tubular. 

Height and Spread:

While typically 15-30 cm tall, wedelia can grow up to 70 cm. Its stems can be up to 2 meters long, allowing it to spread and create a dense cover. 

Other Features:

The plant can tolerate a variety of soil types and growing conditions, making it a hardy ground cover. It thrives in warm, tropical climates and can be found in gardens, landscapes, and even naturalized in some areas.