etaerio [ EE-tay-ree-oh ] noun: an aggregate fruit formed from multiple ovaries in a single flower
Unlike simple fruits, which develop from a single ovary in a flower, an etaerio develops from multiple ovaries (sometimes called fruitlets) in a single flower arranged over the surface of or within the flower’s receptacle. An etaerio is also called an aggregate fruit. Fruits like achenes, samaras, follicles, berries, and drupes can be simple or aggregated, depending on the plant species.
Etaerio of achenes
an aggregate of one-seeded, dry, indehiscent fruits
Etaerio of samaras
an aggregate of winged achenes
Etaerio of follicles
an aggregate of dry, dehiscent, unilocular (containing a single cavity) fruits with two or more seeds formed from a single carpel
Etaerio of berries
an aggregate of fleshy berries crowded on the receptacle
Etaerio of drupes
an aggregate of fleshy drupes or drupelets