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.
Destitute of hairs.
Applied to leaves or to the parts of a flower when they overlap each other.
Unequally pinnate, having an odd terminal leaflet.
Some part wanting, as calyx, corolla, etc.
The membranous covering of the spore-cases of many Ferns.
Anthers opening inwards, towards the axis, are introrse.
The name given to one or more series of bracts surrounding a head of flowers, etc.
Petals or sepals unequal in size or different in form in the same flower.
Applied to a pair of leaflets; thus a leaf may be unijugate, bi-jugate or miltijugate, according as there are one, two, or many pairs of leaflets.