The hollow holdfast of furbelows, covered in suction pads.
The loops of blue and taches of gold, never let go their holdfast.
In germination of the seed the root of the embryo (radicle) grows out to get a holdfast for the plant; this is generally followed by the growth of the short stem immediately above the root, the so-called "hypocotyl," which carries up the cotyledons above the ground, where they spread to the light and become the first green leaves of the plant.
The most fundamental external differentiation is into holdfast and shoot.
Besides the differentiation into holdfast and shoot, and into branches of limited and branches of unlimited growth, there appear superficial structures of the nature of hairs.