The fourth glume is coriaceous, lanceolate, bisexual or female.
The fourth glume is coriaceous, with a bisexual or female flower.
The flowers of this order are bisexual, with six stamens and a six-parted perianth.
Naiadace—Aquatic herbs with inconspicuous, unisexual or bisexual flowers.
Liliace—Herbs with narrow leaves and showy, bisexual flowers.
This would seem to ...