It is essentially round [130]
It is usually separated distinctly at its termination from the flower [130], [131]
It is to be called in Latin, Petiolus; in English, Flower-stalk [130]
These three are the essential parts of a stem. But
besides these, it has, when largely developed, a permanent form: namely,
IV. The Trunk.—A non-advancing mass of collected stem, arrested at a given height from the ground [139]
The stems of annual plants are either leafy, as of a thistle, or bare, sustaining the flower or flower-cluster at a certain height above the ground. Receiving therefore these following names:—-
V. The Virga.—The leafy stem of an annual plant, not a grass, yet growing upright [147]
VI. The Virgula.—The leafless flower-stem of an annual plant, not a grass, as of a primrose or dandelion [147]
VII. The Filum.—The running stem of a creeping plant