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.
The skin of a seed.
Having six stamens, of which two are shorter than the other four.
The receptacle or torus of a flower.
Having a dense short down.
Having small divisions on the margin.
The part on which the divisions of a flower or fruit are seated,
Tri, in compounds, signifies three.
Having three leaflets proceeding from the same point.
Terminating abruptly, as the leaf of the Tulip-tree.
An underground fleshy stem, like the Dahlia.
Covered with excrescences.