|Etymology||Genus||After Neptune, a god in Greek mythology|
|Species||Plenty, full, or double. The reference to the plant is unknown.|
|Synonyms||Mimosa plena L.|
|Common Names||Dead and Awake, Aquatic Sensitive Plant|
|Native Distribution||Tropical America|
A woody shrub very common in terrestrial and aquatic scrublands. It flowers very often and the yellow flower clusters are distinctive. Another congenor, Neptunia oleracea, has similar flowers but lesser pairs of leaflets (less than 20 while N. plena has more than 20; Windler ).
A thicket of Neptunia plena in a scrubland.
Bipinnate leaves with leaflets of more than 20 pairs.
A honey bee approaching the flower cluster.
Fruit pods ripe (left) and unripe (right).
The legume split at the top and reveal numerous brown seeds.