Blue Waterhyssop
Bacopa caroliniana
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Bacopa_caroliniana
Overview
Blue Waterhyssop is a small aquatic perennial herb with succulent, oval leaves and delicate blue to white flowers that bloom above the water surface. This semi-aquatic plant forms dense mats in shallow waters and serves as important habitat for aquatic invertebrates while helping to stabilize sediments and improve water quality through nutrient uptake.
Blue Waterhyssop faces severe decline primarily due to habitat destruction from wetland drainage, urban development, and agricultural conversion of its native aquatic and semi-aquatic environments. Water pollution from agricultural runoff and urban contamination further degrades remaining suitable habitats, while invasive species competition reduces available ecological niches.
Habitat
Blue Waterhyssop inhabits shallow freshwater environments including pond margins, slow-moving streams, ditches, and seasonal wetlands with muddy or sandy substrates. The species typically grows in areas with fluctuating water levels, from fully submerged conditions to exposed mudflats during dry periods.
Other threatened species in Plantaginaceae
Frequently asked questions
Why is Blue Waterhyssop classified as Critically Endangered?
Where does Blue Waterhyssop live?
What are the main threats to Blue Waterhyssop?
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