SafePlants

Dayflower (Commelina)

Commelina is a genus encompassing approximately 170-230 species, commonly known as dayflowers. This name originates from the ephemeral nature of their blooms, which typically last for only a single day. They are less frequently referred to as "widow's tears."

Considerations for Pets

• Some Commelina species can form mats or clumps, which might be tempting for pets to chew or play with.
• Commelina species have been historically eaten by people; however, pets may react differently.

Scientific Classification

• Genus: Commelina
• Family: Commelinaceae (Spiderwort Family)
• Rank: Genus

Synonyms and Alternative Names

• Commelina cavaleriei H. Lv. (Synonym for Commelina benghalensis)

Common Names

• Dayflower
• Widow's Tears
• Asiatic Dayflower (Commelina communis)
• Tropical Spiderwort (Commelina benghalensis)
• Blue Wandering Jew (Potentially Commelina benghalensis - needs verification)
• Scurvy Weed (Commelina cyanea)
• Sleeping Beauty (Commelina coelestis/Commelina tuberosa)

Distribution and Habitat

• Commelina species are widely distributed across the pantropics and subtropics.
• Specifically mentioned locations include: Yemen, Bangladesh, Bhutan, China, India, Sri Lanka, Nepal, Malaysia, tropical Asia, Africa, Florida (with native and introduced species), southeastern Kenya, northeastern Tanzania, and Madagascar.
• Commelina benghalensis is native to tropical Asia and Africa.

Ecological Role

• Some Commelina species, such as Commelina benghalensis (Tropical Spiderwort), are considered weeds and can be invasive.
• Commelina communis is an invasive plant in the Piedmont region.

Morphological Characteristics

• Commelina species can be annuals or perennials.
• They often form mats or clumps.
• Leaves are typically lance-shaped.
• Flowers have three petals and emerge in succession.
• Commelina coelestis is a leafy perennial reaching around two feet high, with fleshy leaves, fleshy roots and small clusters of brilliant blue flowers.
• Commelina benghalensis has creeping stems which assume an ascending position
• Commelina communis is a creeper that grows to approximately 30-90 cm in length.

Quirky Facts

• Commelina cyanea was called "scurvy weed" because early settlers in Australia ate its leaves to alleviate scurvy.
• Commelina africana has canary-yellow flowers instead of the usual blue flowers.

Interactions with Other Organisms

• Commelina diffusa can be infected by Commelina yellow mottle virus (CoYMV), a double-stranded DNA virus.