The Collaborative International Dictionary
Monandrous
Monandrous \Mo*nan"drous\, a. (Bot.) Of or pertaining to the monandria; having but one stamen.
Wiktionary
monandrous
a. 1 (label en botany) Having only one stamen in each flower. 2 Having only one male sexual partner over a period of time.
WordNet
monandrous
adj. having only one husband at a time
Wikipedia
Monandrous
In botanical terms, monandrous simply means to have a single stamen.