Common or Asiatic Dayflower: Commelina communis
Stems: Thick, reaching 2 1/2 feet in length, swollen at the nodes, and often rooting when nodes come into contact with soil.
Flowers: Occur on long flower stalks arising from the region between the stem and leaf (leaf axils). Flowers consist of 2 blue petals and 1 white petal. Each flower will appear for only one day.
Identifying Characteristics: Prior to flowering, this weed is often misidentified as a common grass weed of landscapes or nurseries. For example, Deer-tongue Grass (Panicum clandestinum) is very similar to common dayflower in both appearance and growth habit. However, the lack of ligules and attractive blue and white flowers help to distinguish this weed from most grasses.