from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having six stamens, two of which are shorter than the others, as in most plants of the mustard family.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Belonging to the order Tetradynamia; having six stamens, four of which are uniformly longer than the others.
from The Century Dictionary and Cyclopedia
- Having six stamens, four longer arranged in opposite pairs, and two shorter, inserted lower down: a relation found only in the flowers of Cruciferæ. See cut under stamen.
In other cases the variations in size are of a less general character, and affect certain organs of a whorl in a relative manner, as, for instance, in the case of didynamous or tetradynamous stamens, where two or four stamens are longer than their fellows, the long or short stamens and styles of di - and tri-morphic flowers, &c.
It is a pretty purplish white, tetradynamous plant, which blows from