(adj.) having no petals

Diclesium / Anthocarp fruits of the Four O’Clock family
A different kind of flower
At only 2mm across, neither my 30x loupe nor my extension tubes helped me observe that there are no petals in this tiny bloom.

Diclesium / Anthocarp fruits of the Four O’Clock family
At only 2mm across, neither my 30x loupe nor my extension tubes helped me observe that there are no petals in this tiny bloom.

Spermacoce verticillata

Waltheria indica

Neptunia pubescens

Euphorbia blodgettii
This one was a bit tricky, because the flowers normally have a pinkish tinge. This one was a very bright white. Plus, it has a long growing season here in the Keys, so I most often find the bright red berries forming simultaneously with new flowers. I’ll head back over to double check the fruit in a few days. This species is more common than its close relative, Guinea hen weed. Find more info here.

Rivina humilis flower

Rivina humilis flower

Raceme of Rivina humilis

In between flower and fruit. The sepals and stamens remain, but the petals are gone.

Cynanchum angustifolium

Portulaca oleracea
Currently, many sources still list this under its older synonym Cordia globosa.

Varronia globosa flowers

Varronia globosa fruit

Chamaesyce mesembrianthemifolia