Description of rootstock — Serpentaria has a short rootstock with many thin, branching, fibrous roots.
Internally the rootstock is whitish and of a spongy texture.
Here the rootstock sends up every spring an herbaceous stalk or stem, which bears the foliage and flowers, and dies in autumn.
Of course, there are all gradations between a tuber and a rootstock.
Description of rootstock — The rootstock and roots are employed in medicine.
rootstock short, its base including the buds of succeeding years.
After the rootstock has been kept for some time it will become greenish yellow or brown internally and its quality impaired.
Its leaves and rootstock are astringent, and the latter yields a yellow dye.
From the lower part of the rootstock long, fleshy roots arc produced.
It seems to be taken for granted that any plant with a swollen or thickened stem or rootstock is a "bulbous" one.