Monothecous condition of stamens, i.e. presence of a single anther lobe is a characteristic of Family
Cucurbitaceae
Malvaceae
Asteraceae
Brassicaceae
As we learned
Androecium -
It is the 3rd and male whorl of flower in which each stamen consists of filament, anther and connective. Free stamens are called polyandrous. E.g. hilly, mustard, radish.
- wherein
Two lobed anther is called bithecous (e.g. pea), one lobed anther is called monothecous. E.g. members of malvacaae.