Amphianthus pusillus

Common Names:
Growth Habit:
CPC Number:
Profile Contributors:
Melissa Caspary
Fully Sponsored

Reference Links

ITIS - Tropicos - USDA Plants - Fish & WildLife

Participating Institutions

The following Participating Institutions are custodians for this species in the CPC National Collection:
Cincinnati Zoo & Botanical Garden

The conservation of Amphianthus pusillus is fully sponsored.
Melissa Caspary contributed to this Plant Profile.


Aquatic, annual herb with two types of leaves. Floating leaves less than inch (3 - 5 mm) long, oval, paired at the end of a thread-like stem. Submerged leaves in a rosette at the top of a tiny, underwater stem, each leaf less than inch (up to 5 mm) long and with a pointed tip. Flowers less than inch (3-4 mm) long, white to pale purple, with a short tube and 5 spreading lobes; flowers are held between the floating leaves and also among the submerged rosette leaves. Fruit less than ⅛ inch (3 mm) wide, somewhat flattened, with 2 lobes. Pool sprite could be confused with water starwort (Callitriche heterophylla), which also occurs in pools on granite outcrops; its floating leaves are spoon-shaped and in whorls or rosettes rather than pairs; submerged leaves are narrow and scattered along the underwater stem.

Distribution & Occurrence


Conservation, Ecology & Research