This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Perianth none or reduced to minute scales. Flowers enveloped in imbricated membranous or coriaceous bracts called glumes. Fruit (in the orders referred to in this work) 1-eelled, 1-seeded, perianth-scales usually adhering to the seed.